can anyone help me to convert this project to VISUAL C++,
i am unable to convert this to the new visual c++ as i am doing a assignment in converting
this.

I have tried everything i know as i am a diploma student but unable to get any answers
please i need help urgently.

//PROJECT OF BOOK SHOP 
// Control on Sell out and Sell in
#include "stdafx.h"
#include <fstream.h>
#include <string.h>
#include <stdio.h>
#include <ctype.h>
#include <conio.h>
#include <stdlib.h>
#include <dos.h>

void normalwindow(){
    window(1,1,80,25);
    textbackground(1);
    clrscr();
}
void winup(){
    window(1,1,80,1);
    textbackground(7);
    clrscr();
}

void wincenter(){
    window(1,2,80,24);
    textbackground(9);
    clrscr();
}

void windown(){
    window(1,25,80,25);
    textbackground(7);
    textcolor(2);
    clrscr();
}
void textdown(){
    windown();
    gotoxy(5,1);
    cputs;
    struct date d;
    getdate(&d);
    textcolor(254);
    gotoxy(63,1);
    cputs("(");
    gotoxy(76,1);
    cputs(") <-");
    if(d.da_day<10){
        gotoxy(65,1);
        cputs("0");
        gotoxy(66,1);
        cprintf("%d/", d.da_day);
    }else{
        gotoxy(65,1);
        cprintf("%d/", d.da_day);
    }
    if(d.da_mon<10){
        gotoxy(68,1);
        cputs("0");
        gotoxy(69,1);
        cprintf("%d/", d.da_mon);
    }else{
        gotoxy(68,1);
        cprintf("%d/", d.da_mon);
    }
    gotoxy(71,1);
    cprintf("%d", d.da_year);
    textcolor(2);
}
void textup(){
    winup();
    textcolor(RED);
    gotoxy(2,1);
    cputs("ð");
    textcolor(RED);
    gotoxy(4,1);
    cputs("E");
    textcolor(BLACK);
    gotoxy(5,1);
    cputs("xit ");
    gotoxy(9,1);
    cputs("( Press     )");
    textcolor(RED);
    gotoxy(17,1);
    cputs("Esc"); // 27
    gotoxy(60,1);
    cputs("A");
    textcolor(BLACK);
    gotoxy(61,1);
    cputs("bout");
    gotoxy(66,1);
    cputs("( Press    )");
    textcolor(RED);
    gotoxy(74,1);
    cputs("F1");   // 59
}
void back(){
    _setcursortype(_NOCURSOR);
    textup();
    textdown();
    wincenter();
    gotoxy(1,1);
    puts("  ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³");
    gotoxy(1,2);
    puts("ÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄ");
    gotoxy(1,3);
    puts("  ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³");
    gotoxy(1,4);
    puts("ÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄ");
    gotoxy(1,5);
    puts("  ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³");
    gotoxy(1,6);
    puts("ÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄ");
    gotoxy(1,7);
    puts("  ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³");
    gotoxy(1,8);
    puts("ÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄ");
    gotoxy(1,9);
    puts("  ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³");
    gotoxy(1,10);
    puts("ÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄ");
    gotoxy(1,11);
    puts("  ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³");
    gotoxy(1,12);
    puts("ÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄ");
    gotoxy(1,13);
    puts("  ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³");
    gotoxy(1,14);
    puts("ÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄ");
    gotoxy(1,15);
    puts("  ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³");
    gotoxy(1,16);
    puts("ÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄ");
    gotoxy(1,17);
    puts("  ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³");
    gotoxy(1,18);
    puts("ÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄ");
    gotoxy(1,19);
    puts("  ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³");
    gotoxy(1,20);
    puts("ÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄ");
    gotoxy(1,21);
    puts("  ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³");
    gotoxy(1,22);
    puts("ÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄÄÄÅÄÄ");
    gotoxy(1,23);
    puts("  ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³    ³");
    gotoxy(1,24);
}
void graph(){
    back();
    textcolor(0);
    gotoxy(55,5);
    cputs("ÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛ");
    gotoxy(79,4);
    cputs("Û");
    gotoxy(79,3);
    cputs("Û");
    gotoxy(3,6);
    cputs("ÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛ");
    gotoxy(31,4);
    cputs("Û");
    gotoxy(31,5);
    cputs("Û");
    textcolor(1);
    textbackground(6);
    gotoxy(54,2);
    cputs;
    gotoxy(54,3);
    cputs;
    gotoxy(54,4);
    cputs;
    textcolor(4);
    textbackground(7);
    gotoxy(2,3);
    cputs;
    gotoxy(2,4);
    cputs;
    gotoxy(2,5);
    cputs;
}
    textcolor(0);
    gotoxy(21,21);
    cputs("ÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛ");
    gotoxy(64,20);
    cputs("Û");
    gotoxy(64,19);
    cputs("Û");
    gotoxy(64,18);
    cputs("Û");

    gotoxy(64,15);
    cputs("Û");
    gotoxy(64,16);
    cputs("Û");
    gotoxy(64,17);
    cputs("Û");
    gotoxy(64,14);
    cputs("Û");
    gotoxy(64,13);
    cputs("Û");
    gotoxy(64,12);
    cputs("Û");
    gotoxy(64,11);
    cputs("Û");
    textcolor(11);
    textbackground(12);
    gotoxy(20,10);
    cputs("ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»");
    gotoxy(20,11);
    cputs("º                                          º");
    gotoxy(20,12);
    cputs("ÌÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͹");
    gotoxy(20,13);
    cputs("º                                          º");
    gotoxy(20,14);
    cputs("º                                          º");
    gotoxy(20,15);
    cputs("º                                          º");
    gotoxy(20,16);
    cputs("º                                          º");
    gotoxy(20,17);
    cputs("º                                          º");
    gotoxy(20,18);
    cputs("º                                          º");
    gotoxy(20,19);
    cputs("º                                          º");
    gotoxy(20,20);
    cputs("ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ");
    gotoxy(50,11);
    for(int i=0;i<strlen(word[0]);i++){
        gotoxy(32+i,11);
        cprintf("%c",word[0][i]);
        delay(100);
    }
    textcolor(10);
    for(i=0;i<strlen(word[4]);i++){
        gotoxy(22+i,13);
        cprintf("%c",word[4][i]);
        delay(50);
    }
    for(i=0;i<strlen(word[5]);i++){
        gotoxy(40+i,13);
        cprintf("%c",word[5][i]);
        delay(50);
    }
    textcolor(253);
    gotoxy(35,15);
    cputs("--------------");
    gotoxy(35,16);
    cputs("   CLASS MCS  ");
    gotoxy(35,17);
    cputs("--------------");
    textcolor(9);
    for(i=0;i<strlen(word[1]);i++){
        gotoxy(22+i,18);
        cprintf("%c",word[1][i]);
        delay(50);
    }
    for(i=0;i<strlen(word[2]);i++){
        gotoxy(40+i,18);
        cprintf("%c",word[2][i]);
        delay(50);
    }
    for(i=0;i<strlen(word[3]);i++){
        gotoxy(40+i,19);
        cprintf("%c",word[3][i]);
        delay(50);
    }
    textcolor(253);
    gotoxy(35,15);
    cputs("--------------");
    gotoxy(35,16);
    cputs("   CLASS A1   ");
    gotoxy(35,17);
    cputs("--------------");
    getch();
}
void logo(){
    textcolor(0);
    gotoxy(21,21);
    cputs("ÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛ");
    gotoxy(64,20);
    cputs("Û");
    gotoxy(64,19);
    cputs("Û");
    gotoxy(64,18);
    cputs("Û");

    gotoxy(64,15);
    cputs("Û");
    gotoxy(64,16);
    cputs("Û");
    gotoxy(64,17);
    cputs("Û");
    gotoxy(64,14);
    cputs("Û");
    gotoxy(64,13);
    cputs("Û");
    gotoxy(64,12);
    cputs("Û");
    gotoxy(64,11);
    cputs("Û");
    textcolor(251);
    textbackground(12);
    gotoxy(20,10);
    cputs("ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»");
    gotoxy(20,11);
    cputs("º          COMPUTER BOOK SHOP          º");
    gotoxy(20,12);
    cputs("ÌÍÍÍËÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͹");
    gotoxy(20,13);
    cputs("º   º                                      º");
    gotoxy(20,14);
    cputs("º   º                                      º");
    gotoxy(20,15);
    cputs("º   º                                      º");
    gotoxy(20,16);
    cputs("º   º                                      º");
    gotoxy(20,17);
    cputs("º   º                                      º");
    gotoxy(20,18);
    cputs("º   º                                      º");
    gotoxy(20,19);
    cputs("º   º                                      º");
    gotoxy(20,20);
    cputs("ÈÍÍÍÊÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ");
    textcolor(14);
    gotoxy(26,13);
    cputs("Add Book To Stock ");
    gotoxy(26,14);
    cputs("Sell Book From Stock ");
    gotoxy(26,15);
    cputs("View Book Sold so far ");
    gotoxy(26,16);
    cputs("View Book In Stock ");
    gotoxy(26,17);
    cputs("Search Book In Stock ");
    gotoxy(26,18);
    cputs("Delete Book From Stock ");
    gotoxy(26,19);
    cputs("Exit ");
}


void gra_input(){
    textcolor(0);
    gotoxy(10,22);
    cputs("ÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛ");
    gotoxy(74,10);
    cputs("ÛÛ");
    gotoxy(74,11);
    cputs("ÛÛ");
    gotoxy(74,12);
    cputs("ÛÛ");
    gotoxy(74,13);
    cputs("ÛÛ");
    gotoxy(74,14);
    cputs("ÛÛ");
    gotoxy(74,15);
    cputs("ÛÛ");
    gotoxy(74,16);
    cputs("ÛÛ");
    gotoxy(74,17);
    cputs("ÛÛ");
    gotoxy(74,18);
    cputs("ÛÛ");
    gotoxy(74,19);
    cputs("ÛÛ");
    gotoxy(74,20);
    cputs("ÛÛ");
    gotoxy(74,21);
    cputs("ÛÛ");

    textcolor(14);
    gotoxy(30,8);
    cputs("***  ADD NEW RECORD  ***");
    textcolor(5);
    textbackground(11);

    gotoxy(8,9);
    cputs("ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍËÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»");
    gotoxy(8,10);
    cputs("º Book's Title:  º ");
    gotoxy(72,10);
    cputs(" º");
    gotoxy(8,11);
    cputs("ÌÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÎÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍËÍÍÍÍÍÍÍÍÍÍÍËÍÍÍÍÍÍÍÍÍÍÍÍ͹");
    gotoxy(8,12);
    cputs("º Book's ID:     º ");
    gotoxy(46,12);
    cputs(" º Date:     º ");
    gotoxy(72,12);
    cputs(" º");
    gotoxy(8,13);
    cputs("ÌÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÎÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÊÍÍÍÍÍÍÍÍÍÍÍÊÍÍÍÍÍÍÍÍÍÍÍÍ͹");
    gotoxy(8,14);
    cputs("º Author:        º ");
    gotoxy(72,14);
    cputs(" º");
    gotoxy(8,15);
    cputs("ÌÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÎÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͹");
    gotoxy(8,16);
    cputs("º Category:      º ");
    gotoxy(72,16);
    cputs(" º");
    gotoxy(8,17);
    cputs("ÌÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÎÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͹");
    gotoxy(8,18);
    cputs("º Value of Book: º ");
    gotoxy(72,18);
    cputs(" º");
    gotoxy(8,19);
    cputs("ÌÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÎÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ͹");
    gotoxy(8,20);
    cputs("º Book's Price:  º ");
    gotoxy(72,20);
    cputs(" º");
    gotoxy(8,21);
    cputs("ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÊÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ");
    textbackground(0);
    gotoxy(27,10);
    cputs("                                             ");
    gotoxy(27,12);
    cputs("                   ");
    gotoxy(61,12);
    cputs("           ");
    gotoxy(27,14);
    cputs("                                             ");
    gotoxy(27,16);
    cputs("                                             ");
    gotoxy(27,18);
    cputs("                                             ");
    gotoxy(27,20);
    cputs("                                             ");

}

void gra_output(){
    textcolor(14);
    gotoxy(27,8);
    cputs("***  DISPLAY BOOK IN STOCK  ***");
    textcolor(5);
    textbackground(11);
    gotoxy(4,9);
    cputs("ÉÍÍÍÍÍÍËÍÍÍÍÍÍÍÍÍËÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍËÍÍÍÍÍÍËÍÍÍÍÍÍÍËÍÍÍÍÍÍÍÍ»");
    gotoxy(4,10);
    cputs("º  N§  º Book ID º   Book Title or Name          º Quan º Price º Total  º");
    gotoxy(4,11);
    cputs("ÌÍÍÍÍÍÍÎÍÍÍÍÍÍÍÍÍÎÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÎÍÍÍÍÍÍÎÍÍÍÍÍÍÍÎÍÍÍÍÍÍÍ͹");
    gotoxy(4,12);
    cputs("º      º         º                               º      º       º        º");
    gotoxy(4,13);
    cputs("º      º         º                               º      º       º        º");
    gotoxy(4,14);
    cputs("º      º         º                               º      º       º        º");
    gotoxy(4,15);
    cputs("º      º         º                               º      º       º        º");
    gotoxy(4,16);
    cputs("º      º         º                               º      º       º        º");
    gotoxy(4,17);
    cputs("º      º         º                               º      º       º        º");
    gotoxy(4,18);
    cputs("º      º         º                               º      º       º        º");
    gotoxy(4,19);
    cputs("º      º         º                               º      º       º        º");
    gotoxy(4,20);
    cputs("ÈÍÍÍÍÍÍÊÍÍÍÍÍÍÍÍÍÊÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÊÍÍÍÍÍÍÊÍÍÍÍÍÍÍÊÍÍÍÍÍÍÍͼ");
}
void gra_sell(){
    textcolor(14);
    gotoxy(27,8);
    cputs("***  DISPLAY BOOK OUT STOCK  ***");
    textcolor(5);
    textbackground(11);
    gotoxy(4,9);
    cputs("ÉÍÍÍÍÍÍËÍÍÍÍÍÍÍÍÍËÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍËÍÍÍÍÍÍËÍÍÍÍÍÍÍËÍÍÍÍÍÍÍÍ»");
    gotoxy(4,10);
    cputs("º  N§  º Book ID º   Book Title or Name          º Quan º Price º Total  º");
    gotoxy(4,11);
    cputs("ÌÍÍÍÍÍÍÎÍÍÍÍÍÍÍÍÍÎÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÎÍÍÍÍÍÍÎÍÍÍÍÍÍÍÎÍÍÍÍÍÍÍ͹");
    gotoxy(4,12);
    cputs("º      º         º                               º      º       º        º");
    gotoxy(4,13);
    cputs("º      º         º                               º      º       º        º");
    gotoxy(4,14);
    cputs("º      º         º                               º      º       º        º");
    gotoxy(4,15);
    cputs("º      º         º                               º      º       º        º");
    gotoxy(4,16);
    cputs("º      º         º                               º      º       º        º");
    gotoxy(4,17);
    cputs("º      º         º                               º      º       º        º");
    gotoxy(4,18);
    cputs("º      º         º                               º      º       º        º");
    gotoxy(4,19);
    cputs("º      º         º                               º      º       º        º");
    gotoxy(4,20);
    cputs("ÈÍÍÍÍÍÍÊÍÍÍÍÍÍÍÍÍÊÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÊÍÍÍÍÍÍÊÍÍÍÍÍÍÍÊÍÍÍÍÍÍÍͼ");
}

struct lib{
    char name[80];
    char id[5];
    char author[20];
    char date[11];
    short int number;
    char category[20];
    float cost;
    float total;
};

class library{
    protected:
        lib book[200];
        static int count;
        static int index;
    public:
        library();
        ~library()
            {cout<<"Done";}
        void book_sell();
        void read_file();
        void write_file();
        void input_data();
        void output_data();
        void find_count();
        void find_book();
        void search_book();
        void delete_book();
        void scand_book();
        void sort_book();
        void sort_sell();
        void out_book();
};

int library::count=-1;
int library::index=119;

library::library(){
    for(int i=0;i<200;i++){
        strcpy(book[i].name,"");
        strcpy(book[i].id,"");
        strcpy(book[i].author,"");
        strcpy(book[i].date,"");
        strcpy(book[i].category,"");
        book[i].number=0;
        book[i].cost=0;
        book[i].total=0;
    }
}

void library::find_count(){
    for(int i=0;strcmp(book[i].id,"")!=0;i++);
    count = i - 1;
    for(int j=120;strcmp(book[j].id,"")!=0;j++);
    index = j - 1;
}

void library::read_file(){
    ifstream infile;
    infile.open("book.db", ios::nocreate);
    if(infile)
    infile.read((char*)this,sizeof(*this));
}

void library::write_file(){
    ofstream outfile;
    outfile.open("book.DAT");
    if(outfile){
        outfile.write((char*)this,sizeof(*this));
    }else{
        cout<<"\n Cannot Open This file! \n";
        exit(1);
    }
    outfile.close();
}

void library::input_data(){
    _setcursortype(_SOLIDCURSOR);
    gotoxy(27,10);
    gets(book[++count].name);
    id_con:
    gotoxy(27,12);
    gets(book[count].id);
    if((strlen(book[count].id))<4 || (strlen(book[count].id))>4){
        gotoxy(27,12);
        cout << "         ";
        goto id_con;
    }
    gotoxy(61,12);
    gets(book[count].date);
    gotoxy(27,14);
    gets(book[count].author);
    gotoxy(27,16);
    gets(book[count].category);
    gotoxy(27,18);
    cin >> book[count].number;
    gotoxy(27,20);
    cin >> book[count].cost;
    cin.get();
    book[count].total = book[count].number * book[count].cost;
    scand_book();
}

void library::book_sell(){
    char subject[10], ch;
    int change, too, taa=0;
    float price;
    play:
    normalwindow();
    graph();
    textbackground(9);
    textcolor(11);
    gotoxy(20,10);
    cputs("ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍËÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»");
    gotoxy(20,11);
    cputs("º Enter Book's ID : º               º");
    gotoxy(20,12);
    cputs("ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÊÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ");
    _setcursortype(_SOLIDCURSOR);
    gotoxy(42,11);
    cin >> subject;
    for(int i=0;i<=count;i++){
        if(strcmp(book[i].id, subject)==0){
            too = i;
            taa = 1;
        }
    }
    if(taa==1){
        _setcursortype(_NOCURSOR);
        textbackground(3);
        textcolor(11);
        gotoxy(8,14);
        cputs("ÉÍÍÍÍÍÍÍÍÍËÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍËÍÍÍÍÍÍËÍÍÍÍÍÍÍËÍÍÍÍÍÍÍÍ»");
        gotoxy(8,15);
        cputs("º Book ID º   Book Title or Name          º Quan º Price º Total  º");
        gotoxy(8,16);
        cputs("ÌÍÍÍÍÍÍÍÍÍÎÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÎÍÍÍÍÍÍÎÍÍÍÍÍÍÍÎÍÍÍÍÍÍÍ͹");
        gotoxy(8,17);
        cputs("º         º                               º      º       º        º");
        gotoxy(8,18);
        cputs("ÈÍÍÍÍÍÍÍÍÍÊÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÊÍÍÍÍÍÍÊÍÍÍÍÍÍÍÊÍÍÍÍÍÍÍͼ");
        textcolor(12);
        gotoxy(11,17);
        cputs(book[too].id);
        gotoxy(22,17);
        cputs(book[too].name);
        gotoxy(53,17);
        cprintf("%d",book[too].number);
        gotoxy(59,17);
        cprintf("%.2f",book[too].cost);
        gotoxy(67,17);
        cprintf("%.2f",book[too].total);
        textbackground(5);
        textcolor(252);
        gotoxy(12,20);
        cputs("ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»");
        gotoxy(12,21);
        cputs("º  HOW MANY BOOK DO YOU WANT TO SELL :     AND COST:       º");
        gotoxy(12,22);
        cputs("ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ");
        Again:
        _setcursortype(_SOLIDCURSOR);
        gotoxy(51,21);
        cin >> change;
        if(change>book[too].number){
            gotoxy(51,21);
            printf("   ");
            goto Again;
        }else{
            gotoxy(65,21);
            cin >> price;
            book[too].number = book[too].number - change;
            if(book[too].number==0){
                strcpy(book[++index].id,book[too].id);
                strcpy(book[index].name,book[too].name);
                strcpy(book[index].date,book[too].date);
                strcpy(book[index].author,book[too].author);
                strcpy(book[index].category,book[too].category);
                book[index].number = change;
                book[index].cost = price;
                book[index].total = book[index].number * book[index].cost;
                strcpy(book[count].id,"");
            }else{
                book[too].number = book[too].number;
                book[too].cost = book[too].cost;
                book[too].total = book[too].number * book[too].cost;
                strcpy(book[++index].id,book[too].id);
                strcpy(book[index].name,book[too].name);
                strcpy(book[index].date,book[too].date);
                strcpy(book[index].author,book[too].author);
                strcpy(book[index].category,book[too].category);
                book[index].number = change;
                book[index].cost = price;
                book[index].total = book[index].number * book[index].cost;
            }
        }
    }
    if(taa==0){
        textbackground(9);
        textcolor(259);
        gotoxy(20,10);
        cputs("ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»");
        gotoxy(20,11);
        cputs("º         Invalid Book's ID         º");
        gotoxy(20,12);
        cputs("ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ");
        textcolor(12);
        gotoxy(18,15);
        cputs("  Do you want to quit or continue (y/n). ");
        ch = toupper(getch());
    }
    if(ch == 'Y') goto play;

}

void library::output_data(){
    if(count==-1){
        textbackground(6);
        textcolor(253);
        gotoxy(20,10);
        cputs("ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»");
        gotoxy(20,11);
        cputs("º          NO DATA IN STOCK         º");
        gotoxy(20,12);
        cputs("ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ");
    }else{
        gra_output();
        textcolor(RED);
        int change=12;
        for(int i=0;i<=count;i++){
            gotoxy(7,change+i);
            cprintf("%d",i+1);
            gotoxy(13,change+i);
            cputs(book[i].id);
            gotoxy(25,change+i);
            cputs(book[i].name);
            gotoxy(56,change+i);
            cprintf("%d",book[i].number);
            gotoxy(62,change+i);
            cprintf("%.2f",book[i].cost);
            gotoxy(70,change+i);
            cprintf("%.2f",book[i].total);
            if((i+1)%8==0){
                textcolor(252);
                gotoxy(30,22);
                cputs(" Press any key to Continue...");
                getch();
                change = change - 8;
                gra_output();
                textcolor(RED);
            }
        }

    }
    getch();
}

void library::out_book(){
    if(index==119){
        textbackground(6);
        textcolor(253);
        gotoxy(20,10);
        cputs("ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»");
        gotoxy(20,11);
        cputs("º         NO DATA OUT STOCK         º");
        gotoxy(20,12);
        cputs("ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ");
    }else{
        gra_sell();
        textcolor(RED);
        int change=11;
        int plus=0;
        for(int i=120;i<=index;i++){
            plus++;
            gotoxy(7,change+plus);
            cprintf("%d",plus);
            gotoxy(13,change+plus);
            cputs(book[i].id);
            gotoxy(25,change+plus);
            cputs(book[i].name);
            gotoxy(56,change+plus);
            cprintf("%d",book[i].number);
            gotoxy(62,change+plus);
            cprintf("%.2f",book[i].cost);
            gotoxy(70,change+plus);
            cprintf("%.2f",book[i].total);
            if((i+1)%8==0){
                textcolor(252);
                gotoxy(30,22);
                cputs(" Press any key to Continue...");
                getch();
                change = change - 8;
                gra_output();
                textcolor(RED);
            }
        }

    }
    getch();
}

void library::find_book(){
    char subject[10], ch;
    int taa=0, too;
    play:
    normalwindow();
    graph();
    textbackground(5);
    textcolor(12);
    gotoxy(20,10);
    cputs("ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍËÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»");
    gotoxy(20,11);
    cputs("º Enter Book's ID : º               º");
    gotoxy(20,12);
    cputs("ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÊÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ");
    _setcursortype(_SOLIDCURSOR);
    gotoxy(42,11);
    cin >> subject;
    for(int i=0;i<=count;i++){
        if(strcmp(book[i].id, subject)==0){
            too = i;
            taa = 1;
        }
    }
    if(taa==1){
        _setcursortype(_NOCURSOR);
        textbackground(3);
        textcolor(11);
        gotoxy(8,14);
        cputs("ÉÍÍÍÍÍÍÍÍÍËÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍËÍÍÍÍÍÍËÍÍÍÍÍÍÍËÍÍÍÍÍÍÍÍ»");
        gotoxy(8,15);
        cputs("º Book ID º   Book Title or Name          º Quan º Price º Total  º");
        gotoxy(8,16);
        cputs("ÌÍÍÍÍÍÍÍÍÍÎÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÎÍÍÍÍÍÍÎÍÍÍÍÍÍÍÎÍÍÍÍÍÍÍ͹");
        gotoxy(8,17);
        cputs("º         º                               º      º       º        º");
        gotoxy(8,18);
        cputs("ÈÍÍÍÍÍÍÍÍÍÊÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÊÍÍÍÍÍÍÊÍÍÍÍÍÍÍÊÍÍÍÍÍÍÍͼ");
        textcolor(12);
        gotoxy(11,17);
        cputs(book[too].id);
        gotoxy(22,17);
        cputs(book[too].name);
        gotoxy(53,17);
        cprintf("%d",book[too].number);
        gotoxy(59,17);
        cprintf("%.2f",book[too].cost);
        gotoxy(67,17);
        cprintf("%.2f",book[too].total);
        getch();
    }
    if(taa==0){
        textbackground(9);
        textcolor(259);
        gotoxy(20,10);
        cputs("ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»");
        gotoxy(20,11);
        cputs("º         Invalid Book's ID         º");
        gotoxy(20,12);
        cputs("ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ");
        textcolor(12);
        gotoxy(18,15);
        cputs("  Do you want to quit or continue (y/n). ");
        ch = toupper(getch());
    }
    if(ch == 'Y') goto play;

}

void library::scand_book(){
    for(int i=0;i<=count-1;i++){
        if(strcmp(book[i].id,book[count].id)==0){
            strcpy(book[i].id,book[count].id);
            strcpy(book[i].name,book[count].name);
            strcpy(book[i].date,book[count].date);
            strcpy(book[i].author,book[count].author);
            strcpy(book[i].category,book[count].category);
            book[i].number = book[i].number + book[count].number;
            book[i].cost = book[i].cost;
            book[i].total = book[i].total + book[count].total;
            strcpy(book[count].id,"");
        }
    }

}

void library::delete_book(){
    char subject[10], ch;
    int taa=0, too;
    play:
    normalwindow();
    graph();

    textbackground(9);
    textcolor(11);
    gotoxy(20,10);
    cputs("ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍËÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»");
    gotoxy(20,11);
    cputs("º Enter Book's ID : º               º");
    gotoxy(20,12);
    cputs("ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÊÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ");
    _setcursortype(_SOLIDCURSOR);
    gotoxy(42,11);
    cin >> subject;
    for(int i=0;i<=count;i++){
        if(strcmp(book[i].id, subject)==0){
            too = i;
            taa = 1;
        }
    }
    if(taa==1){
        _setcursortype(_NOCURSOR);
        textbackground(3);
        textcolor(11);
        gotoxy(8,14);
        cputs("ÉÍÍÍÍÍÍÍÍÍËÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍËÍÍÍÍÍÍËÍÍÍÍÍÍÍËÍÍÍÍÍÍÍÍ»");
        gotoxy(8,15);
        cputs("º Book ID º   Book Title or Name          º Quan º Price º Total  º");
        gotoxy(8,16);
        cputs("ÌÍÍÍÍÍÍÍÍÍÎÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÎÍÍÍÍÍÍÎÍÍÍÍÍÍÍÎÍÍÍÍÍÍÍ͹");
        gotoxy(8,17);
        cputs("º         º                               º      º       º        º");
        gotoxy(8,18);
        cputs("ÈÍÍÍÍÍÍÍÍÍÊÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÊÍÍÍÍÍÍÊÍÍÍÍÍÍÍÊÍÍÍÍÍÍÍͼ");
        textcolor(12);
        gotoxy(11,17);
        cputs(book[too].id);
        gotoxy(22,17);
        cputs(book[too].name);
        gotoxy(53,17);
        cprintf("%d",book[too].number);
        gotoxy(59,17);
        cprintf("%.2f",book[too].cost);
        gotoxy(67,17);
        cprintf("%.2f",book[too].total);
        textbackground(5);
        textcolor(252);
        gotoxy(20,20);
        cputs("ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»");
        gotoxy(20,21);
        cputs("º  Do you want delete this book (y/n)  º");
        gotoxy(20,22);
        cputs("ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ");
        ch = toupper(getch());
        if(ch=='Y'){
            strcpy(book[too].id,book[count].id);
            strcpy(book[too].name,book[count].name);
            strcpy(book[too].date,book[count].date);
        strcpy(book[too].author,book[count].author);
            strcpy(book[too].category,book[count].category);
            book[too].number = book[count].number;
            book[too].cost = book[count].cost;
            book[too].total = book[count].total;
            strcpy(book[count].id,"");
        }
    }
    if(taa==0){
        textbackground(9);
        textcolor(259);
        gotoxy(20,10);
        cputs("ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»");
        gotoxy(20,11);
        cputs("º         Invalid Book's ID         º");
        gotoxy(20,12);
        cputs("ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ");
        textcolor(12);
        gotoxy(18,15);
        cputs("  Do you want to quit or continue (y/n). ");
        ch = toupper(getch());
    }
    if(ch == 'Y') goto play;
}

void library::sort_book(){
    lib temp;
    for(int i=1;i<=count;i++){
        temp=book[i];
        for(int j=i-1;j>=0 && (strcmpi(temp.id,book[j].id)<0);j--)
        book[j+1]=book[j];
        book[j+1]=temp;
    }
}


void main(){
    int a, b=1;
    char ch;
    library book;
    Again:
    book.read_file();
    book.find_count();
    graph();
    logo();
    while(1){
        _setcursortype(_NOCURSOR);
        kea:for(a=1;a<=7;++a){
            if(a==b){
                textcolor(9);
                if (b==1){
                    gotoxy(21,13);
                    cputs("  ");
                }else if (b==2){
                    gotoxy(21,14);
                    cputs("  ");
                }else if (b==3){
                    gotoxy(21,15);
                    cputs("  ");
                }else if (b==4){
                    gotoxy(21,16);
                    cputs("  ");
                }else if (b==5){
                    gotoxy(21,17);
                    cputs("  ");
                }else if (b==6){
                    gotoxy(21,18);
                    cputs("  ");
                }else if (b==7){
                    gotoxy(21,19);
                    cputs("  ");
                }
            }else{
                textcolor(14);
                if (a==1){
                    gotoxy(21,13);
                    cputs("   ");
                }else if (a==2) {
                    gotoxy(21,14);
                    cputs("   ");
                }else if (a==3) {
                    gotoxy(21,15);
                    cputs("   ");
                }else if (a==4) {
                    gotoxy(21,16);
                    cputs("   ");
                }else if (a==5) {
                    gotoxy(21,17);
                    cputs("   ");
                }else if (a==6) {
                    gotoxy(21,18);
                    cputs("   ");
                }else if (a==7) {
                    gotoxy(21,19);
                    cputs("   ");
                }
            }
        }
        while (ch != 27){
            ch=getch();
            if (ch==13){
                if (b==1){
                    normalwindow();
                    graph();
                    gra_input();
                    book.input_data();
                    book.sort_book();
                    book.write_file();
                    goto Again;
                }else if (b==2){
                    normalwindow();
                    graph();
                    book.book_sell();
                    book.write_file();
                    goto Again;
                }else if (b==3){
                    normalwindow();
                    graph();
                    book.out_book();
                    goto Again;
                }else if (b==4){
                    normalwindow();
                    graph();
                    book.output_data();
                    goto Again;
                }else if (b==5){
                    normalwindow();
                    graph();
                    book.find_book();
                    goto Again;
                }else if (b==6){
                    normalwindow();
                    graph();
                    book.delete_book();
                    book.write_file();
                    goto Again;
                }else if(b==7){
                    book.sort_book();
                    book.write_file();
                    exit(1);
                }
            }
            if (ch==0){
                ch=getch();
                if (ch==80){
                    b++;
                    if (b>7) b=1;
                    goto kea;
                }
                if (ch==72){
                    b--;
                    if (b<1) b=7;
                    goto kea;
                }
                if(ch==59){
                    normalwindow();
                    graph();
                    about_me();
                    goto Again;
                }
            }
        }
        book.sort_book();
        book.write_file();
        exit(1);
system ("pause");

    }
}

Get rid of these...

#include <fstream.h>
#include <conio.h>
#include <dos.h>

...and discard all the functions you are using from them, such as gotoxy and cputs , et al. And if you still want the character-mode stuff, look into this. And, frankly, discard most of what you've learned in "C++" I/O so far and start over from scratch.

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