:cry:
Please help me,I'm a bigginner programmer.
I have to send a project after tomorrow .
My project is "Student Library".
Programmed :
-->Shor menu for user to select :
a)add : student id,name,score(mid,final)
b)delete
c)modify
d)list by idlike this --
***and in add menu user must not insert the same id***
I don't know how to add delete and modify and how to check if it match the old one..
I really don't know...please help
May be some of you write some code for me to learn more
#ifndef PROJ_H
#define PROJ_H
/*------------------------------------------------------------*/
enum ScoreIndex {Midterm,Lab,Final,Total};
enum GradeType {A,B,C,D,F};
unsigned short ScoreType;
unsigned int IDType;
const int NAMELENGTH=40;
struct Student{
IDType sid;
char name[NAMELENGTH];
GradeType grade;
ScoreType scores[Total+1];
};
/*------------------------------------------------------------*/
IDType getID();
void getName(char name[],int size);
ScoreType getMidterm();
ScoreType getLab();
ScoreType getFinal();
void displayStuTable(const Student stusrec[],int size);
void displayStuHL(const Student sturec[],int index);
/*------------------------------------------------------------*/
void addRecord(Student StuRec[],int maxsize);
void deleteRecord(Student StuRec[],int maxsize);
void modifyRecord(Student StuRec[],int maxsize);
double computeAverage (const Student StuRec[],short size);
short getMaxIndex (const Student StuRec[],short size);
short getMinIndex (const Student StuRec[],short size);
GradeType getGrade (ScoreType score);
void totGrade (const Student StuRec[],short size,short freq[]);
void bsortID(Student sturec[], short size);
void bsortScore(Student sturec[], short size);
/*------------------------------------------------------------*/
#endif#include <iostream>
using std::cout;
using std::cin;
using std::endl;
#include <iomanip>
using std::setw;
using std::left;
#include "proj.h"
/*------------------------------------------------------------*/
IDType getID()
{
IDType sid;
cout<<"\nPlease,Enter Student ID : ";
cin>>sid;
cin.ignore(80,'\n');
return sid;
}
void getName(char name[],int size)
{
char buffer[40];
cout<<"Please,Enter Student Name : ";
cin.getline(buffer,40);
//strcpy(name,buffer);
for (int i = 0; i < size; ++i)
name[i] = buffer[i];
name[size - 1] = '\0';
}
ScoreType getMidterm()
{
ScoreType score;
cout<<"Please,Enter Midterm Score [0-20] : ";
cin>>score;
cin.ignore(80,'\n');
return score;
}
ScoreType getLab()
{
ScoreType score;
cout<<"Please,Enter Lab Score [0-30] : ";
cin>>score;
cin.ignore(80,'\n');
return score;
}
ScoreType getFinal()
{
ScoreType score;
cout<<"Please,Enter Final Score [0-50] : ";
cin>>score;
cin.ignore(80,'\n');
return score;
}
void displayStuTable(const Student stusrec[],int size)
{
cout<<setw(7)<<"ID "
<<setw(30)<<left<<" Name"
<<setw(7)<<"Midterm"
<<setw(5)<<"Lab"
<<setw(5)<<"Final"
<<setw(5)<<"Total";
for (int i = 0; i < size; ++i)
{
cout<<setw(7)<<stusrec[i].sid<<" "
<<setw(30)<<left<<stusrec[i].name
<<setw(7)<<stusrec[i].scores[Midterm]
<<setw(5)<<stusrec[i].scores[Lab]
<<setw(5)<<stusrec[i].scores[Final]
<<setw(5)<<stusrec[i].scores[Total];
switch (stusrec[i].grade)
{ case A: cout<<setw(5)<< 'A' <<endl; break;
case B: cout<<setw(5)<< 'B' <<endl; break;
case C: cout<<setw(5)<< 'C' <<endl; break;
case D: cout<<setw(5)<< 'D' <<endl; break;
case F: cout<<setw(5)<< 'F' <<endl; break;
}
}
cout<<endl;
}
void displayStuHL(const Student sturec[],int index)
{
cout<<sturec[index].sid<<' '<<left<<setw(30)<<sturec[index].name<<' '
<<sturec[index].scores[Midterm]<<' '<<sturec[index].scores[Lab]
<<' ' << sturec[index].scores[Final] << ' '
<<sturec[index].scores[Total]<<' ';
switch (sturec[index].grade){
case A: cout<< 'A' ; break;
case B: cout<< 'B' ; break;
case C: cout<< 'C' ; break;
case D: cout<< 'D' ; break;
case F: cout<< 'F' ; break;
}
cout<<endl;
}
/*------------------------------------------------------------*/
void addRecord(Student sturec[], int maxsize)
{
int counter = 0;
while ( counter < 100 ) {
int i = 0;
sturec[i].sid = getID();
int id=sturec[i].sid;
for( ; i < 100; i++) {
if ( id != sturec[i].sid) {
getName(sturec[i].name, NAMELENGTH);
sturec[i].scores[Midterm] = getMidterm();
sturec[i].scores[Lab] = getLab();
sturec[i].scores[Final] = getFinal();
sturec[i].scores[Total] = sturec[i].scores[Midterm] +
sturec[i].scores[Lab] + sturec[i].scores[Final];
sturec[i].grade = getGrade(sturec[i].scores[Total]);
cout<<"\nNew Record ("<<sturec[i].sid<<") Added successfully\n";break;}
else cout<<"A student record with the ID already exists"
<<"\nPlease enter again.";
}
counter++; break;}
cout<<"You can not add records more than 100 records.";
}
void deleteRecord(Student sturec[], int maxsize)
{
for (int i=0;i<100;i++)
if ( getID() == sturec[i].sid){
//delete sturec[i];
sturec[i].sid=0;}
}
void modifyRecord(Student sturec[], int maxsize)
{ int i=0;
for (;i<100;i++)
if ( getID() == sturec[i].sid){
//delete sturec[i];
sturec[i].sid=0;}
sturec[i].sid = getID();
getName(sturec[i].name, NAMELENGTH);
sturec[i].scores[Midterm] = getMidterm();
sturec[i].scores[Lab] = getLab();
sturec[i].scores[Final] = getFinal();
sturec[i].scores[Total] = sturec[i].scores[Midterm] +
sturec[i].scores[Lab] + sturec[i].scores[Final];
sturec[i].grade = getGrade(sturec[i].scores[Total]);
}
GradeType getGrade(ScoreType score)
{
switch (score/10)
{ case 10:
case 9: return A;
case 8: return B;
case 7: return C;
case 6: return D;
case 5:
case 4:
case 3:
case 2:
case 1:
case 0: return F;
}
}
double computeAverage(const Student sturec[], short size)
{
if(size>0)
{
int sum = sturec[0].scores[Total];
for(int i = 1; i < size; ++i)
sum += sturec[i].scores[Total];
return static_cast<double>(sum)/size;
}
else return 0.0;
}
short getMaxIndex(const Student sturec[], short size)
{
short index = -1;
if(size>0)
{
index = 0;
for(int i = 1;i<size;++i)
if(sturec[i].scores[Total] > sturec[index].scores[Total])
index = i;
}
return index;
}
short getMinIndex(const Student sturec[], short size)
{
short index = -1;
if(size>0)
{
index = 0;
for(int i = 1;i<size;++i)
if(sturec[i].scores[Total] < sturec[index].scores[Total])
index = i;
}
return index;
}
void totGrade(const Student sturec[], short size, short freq[])
{
freq[A] = freq[B] = freq[C] = freq[D] = freq[F] = 0;
if(size>0)
for( int i=0; i < size; ++i)
freq[sturec[i].grade]++ ;
}
void bsortID(Student sturec[], short size)
{
for (int i = 0; i < size - 1; i++)
for (int j = 0; j < size - 1 - i; j++)
if (sturec[j].sid > sturec[j+1].sid)
{
Student tmp = sturec[j];
sturec[j] = sturec[j+1];
sturec[j+1] = tmp;
}
}
void bsortScore(Student sturec[], short size)
{
for (int i = 0; i < size - 1; i++)
for (int j = 0; j < size - 1 - i; j++)
if (sturec[j].scores[Total] > sturec[j+1].scores[Total])
{
Student tmp = sturec[j];
sturec[j] = sturec[j+1];
sturec[j+1] = tmp;
}
}
/*------------------------------------------------------------*/#include <iostream>
using std::cin;
using std::cout;
using std::endl;
using std::fixed;
#include <iomanip>
using std::setprecision;
#include "proj.h"
int main ()
{
const short MaxStudentSize = 100;
Student students[MaxStudentSize];
short counter = 0;
double average;
short highindex,lowindex;
short frequency [F+1] = {0};
int choice;
do
{
start:
cout<<" 1. Add a new student record\n"
<<" 2. Delete a student record\n"
<<" 3. Modify a student record\n"
<<" 4. List all records by student ID\n"
<<" 5. List all records by total scores\n"
<<" 6. Show Grade Statistics\n"
<<" 7. Quit\n";
cout << "Please,enter your choice : ";
cin >> choice;
switch(choice){
case 1 ://add
counter++;
addRecord(students, MaxStudentSize);goto start;
break;
case 2 ://delete
deleteRecord(students, MaxStudentSize);
break;
case 3 ://modify
modifyRecord(students, MaxStudentSize);
break;
case 4 ://List ID
cout << "\t\tList of All Students by ID Number\n";
bsortID(students, counter);
displayStuTable(students,counter);
break;
case 5 ://List score
cout << "\t\tList of All Students by TotalScore\n";
bsortScore(students, counter);
displayStuTable(students,counter);
break;
case 6 ://Show Stat
bsortID(students, counter);
average = computeAverage(students, counter);
totGrade(students, counter, frequency);
highindex = getMaxIndex(students, counter);
lowindex = getMinIndex(students, counter);
cout << "\tNumber of Students: " << counter << "\tAverage: "
<< fixed << setprecision(2) << average << endl;
cout << " Numbers of Grade A : " << frequency[A]
<< "\n Numbers of Grade B : " << frequency[B]
<< "\n Numbers of Grade C : " << frequency[C]
<< "\n Numbers of Grade D : " << frequency[D]
<< "\n Numbers of Grade F : " << frequency[F] << endl;
cout << "Highest Score : ";
displayStuHL(students, highindex);
cout << "Loweset Score : ";
displayStuHL(students,lowindex);
break;
case 7 : break;
default : "The number should be 1 - 7 : Try again.\n"; }
goto start;
} while (choice!=7);
system("PAUSE");
return 0;
}