this is my program:
there are 2 problems :
1. i am not allowed to use atoi
2. there is a compilation error
this is my code :
#include <stdio.h>
#include <stdlib.h>
typedef struct companyStatus{
double balance;
FILE *invF, *errF;}companyStatus;
void printWord(FILE* file);
FILE* openFile(char* name);
char* getNextWord(FILE *file);
char getNextChar(FILE *file);
char* convert(char* str ,char* arr);
char* getNextWord(FILE *file){
char word[41];
char c;
int i;
i=0;
word[0]='\0';
c = fgetc(file);
while (c != ' ' && c!=EOF && c!='\n')
{
word[i]=c;
i++;
c = fgetc(file);
}
word[i]='\0';
return word;
}
FILE* openFile(char* fileName,char *mode){
FILE *file;
file = fopen(fileName,mode);
return file;
}
char* convert(char* str ,char* arr){
int length;
int i;
length = strlen(str);
for (i=0; i< length; i++){
arr[i] = str[i];
}
arr[length]='\0';
return arr;
}
int countLines(char* fileName){
FILE *file;
char c;
int lines;
file = openFile(fileName,"r");
lines = 0;
if (file != NULL){
c = fgetc(file);
while (c != EOF){
if (c == '\n')
lines++;
c = fgetc(file);
}
fclose(file);
}
return lines;
}
int equals(char* a, char* b){
int i,n;
if (strlen(a) != strlen(b)) return 0;
n = strlen(a);
for (i=0; i<n; i++){
if (a[i]!=b[i]) return 0;
}
return 1;
}
int initDataBase(char* invFileName, char* errFileName,double bal,companyStatus* currStatus){
int rows;
FILE* file;
currStatus->balance=bal;
currStatus->invF=fopen(invFileName,"r");
fclose((FILE*)currStatus->errF);
currStatus->errF=fopen(errFileName,"a");
if (currStatus->errF == NULL || currStatus->invF==NULL){
printf("Could not open file \n");
return 0;
}
return 1;
}
void saveToFile (char* name,char* code, long amount,FILE *file){
int i;
long myNumber;
char longString[10];
for (i=0; i<strlen(name); i++)//write name to file
fputc(name[i],file);
fputc(' ',file);
for (i=0; i<strlen(code); i++)//write code to file
fputc(code[i],file);
fputc(' ',file);
ltoa(amount, longString, 10);
for (i=0; i<strlen(longString); i++)
fputc(longString[i],file);
fputc('\n',file);
fclose(file);
}
void writeError(char* code,char* name,long amount,FILE *file){
int i;
long myNumber;
char longString[10];
for (i=0; i<strlen(code); i++){
fputc(code[i],file);}
fputc(' ',file);
for (i=0; i<strlen(name); i++)
fputc(name[i],file);
fputc(' ',file);
ltoa(amount, longString, 10);
for (i=0; i<strlen(longString); i++)
fputc(longString[i],file);
fputc('\n',file);
fclose(file);
}
void saveErrorFile(FILE *newErrFile, FILE *currErr){
int c;
if (newErrFile == NULL || currErr==NULL) return;
c = fgetc(currErr);
while (c != EOF){
fputc(c,newErrFile);
c = fgetc(currErr);
}
fclose(newErrFile);
fclose(currErr);
}
void saveFileToFile(FILE *from,FILE *to){
int c;
if (from == NULL || to==NULL) return;
c = fgetc(from);
while (c != EOF){
fputc(c,to);
c = fgetc(from);
}
fclose(from);
fclose(to);
}
int saveInventory(char *invFileName,char *errFileName, companyStatus *currStatus){
FILE *invFile;
FILE *newErrFile;
invFile = openFile(invFileName,"w");
newErrFile = openFile(errFileName,"a");
if (invFile==NULL || newErrFile==NULL) return 0;
saveFileToFile(currStatus->invF,invFile);
saveFileToFile(currStatus->errF,newErrFile);
return 1;
}
/*========================================================================================================*/
void makeSale(char* saleFileName, char* invFileName, companyStatus *currStatus,char* currFileName){
int salesRows;
int invRows;
FILE *invFile,*file, *newInvFile;
int i,j;
char salesManName[101];
char code[21];
char* quantity[9];
char* cost[9];
long quant;
long saleCost;
char* name[41];
char* invCode[21];
char* invAmount[9];
long amount;
code[0]='\0';
quantity[0]='\0';
cost[0]='\0';
name[0]='\0';
invCode[0]='\0';
invAmount[0]='\0';
salesRows = countLines(saleFileName);
invRows = countLines(currFileName);
file = openFile(saleFileName,"r");//open file for reading
invFile =fopen(currFileName,"r");
rename(currFileName,"inv1.tmp");
newInvFile = fopen(currFileName,"a");
if (newInvFile == NULL){
printf("Failed to open temp file for reading newInvFile\n");
return;
}
if (invFile == NULL){
printf("Failed to open temp file for reading inv.tmp\n");
return;
}
if (file == NULL){
printf("Failed to open sale file for reading s\n",saleFileName);
return;
}
printf("Please enter name of sales representative(no spaces): ");
scanf("%s",&salesManName);
for (i=0; i<salesRows; i++){
code[0]='\0';
quantity[0]='\0';
cost[0]='\0';
strcat(code,getNextWord(file));
strcat(quantity,getNextWord(file));
strcat(cost,getNextWord(file));
for (j=0; j<invRows; j++){
name[0]='\0';
invCode[0]='\0';
invAmount[0]='\0';
strcat(name,getNextWord(invFile));
strcat(invCode,getNextWord(invFile));
strcat(invAmount,getNextWord(invFile));
if (equals(invCode,code)==1){//found one on the list
quant=atoi(quantity);
amount=atoi(invAmount);
if (invAmount > quant){//we can sell
amount-=quant;
saleCost=atoi(cost);
currStatus->balance+=saleCost;
saveToFile(name,code,invAmount,currStatus->invF);//save to inv
}
if (invAmount==quant){//no need to write to inv
saleCost=atoi(cost);
currStatus->balance+=saleCost;
}
else{
quant=atoi(quantity);
writeError(code,salesManName,quant,currStatus->errF);
}//else
}//if
}//for j
}//for i
remove("inv.tmp");
fclose(file);
// fclose(invFile);
}//func
/*========================================================================================================*/
/*========================================================================================================*/
void makePurchase(char* buyFileName,char* invFileName,companyStatus *currStatus,char* currFileName){
int buyRows,invRows;
FILE* invFile,*file ,*newInvFile;
int i,j;
char name[41];//name in buy file
char code[21];
char quantity[10];
char cost[10];
long quant;
long buyCost;
//inv fields
char invName[41];
char invCode[21];
char invAmount[10];
long amount;
buyRows = countLines(buyFileName);
invRows = countLines(currFileName);
file = openFile(buyFileName,"r");
invFile =fopen(currFileName,"r");
rename(currFileName,"inv2.tmp");
newInvFile = fopen(currFileName,"a");
if (file == NULL){
printf("Failed to open purchase file for reading %s\n",buyFileName);
return;
}
for (i=0; i<buyRows; i++){
name[0]='\0';//name in buy file
code[0]='\0';
quantity[0]='\0';
cost[0]='\0';
strcat(name,getNextWord(file));
strcat(code,getNextWord(file));
strcat(quantity,getNextWord(file));
strcat(cost,getNextWord(file));
for (j=0; j<invRows; j++){
invName[0]='\0';
invCode[0]='\0';
invAmount[0]='\0';
strcat(invName,getNextWord(file));
strcat(invCode,getNextWord(file));
strcat(invAmount,getNextWord(file));
if (equals(invCode,code)==1){//item exist, need to update
quant=atoi(quantity);
amount=atoi(invAmount);
amount+=quant;//the new amount;
buyCost=atoi(cost);
currStatus->balance-=buyCost;//update balance
saveToFile(invName,invCode,amount,currStatus->invF);
}
else{//new item in inv
amount=atoi(invAmount);
buyCost=atoi(cost);
currStatus->balance-=buyCost;//update balance
saveToFile(invName,invCode,amount,currStatus->invF);
}
}//for j
}//for i
remove("inv.tmp");
fclose(file);
}//func
/*========================================================================================================*/
char* initDB(int* init,companyStatus *currStatus){
char inv[101];
char *invName="";
char err[101];
double bal;
int res;
printf("Please enter inventory file name: ");
scanf("%s",&inv);
printf("Please enter balance value: ");
scanf("%lf",&bal);
printf("Please enter error file name: ");
scanf("%s",&err);
res = initDataBase(inv,err,bal,currStatus);
if (res == 0) {
printf("Error in initializing database. Database is not initialized.\n");
*init=0;
currStatus->balance=0.0;
invName=inv;
return invName;
}
*init = 1;
invName=inv;
return invName;
}
void save(companyStatus *currStatus){
char save[101];
char err[101];
printf("Please enter name of file for saving current inventory status: ");
scanf(" %s",&save);
printf("Please enter name of file for saving error status:");
scanf("%s",&save);
saveInventory(save,err,currStatus);
}
void sell(companyStatus *currStatus,char *invFileName){
char sale[101];
char* temp;
printf("Please enter name of sale file: ");
scanf(" %s",&sale);
temp = "inv1.tmp";
makeSale(sale,temp,currStatus,invFileName);
}
void buy(companyStatus *currStatus,char* invFileName){
char buy[101];
char* temp;
printf("Please enter name of purchase file: ");
scanf(" %s",&buy);
temp = "inv2.tmp";
makePurchase(buy,temp,currStatus,invFileName);
}
void go(companyStatus *status){
char ch;
char* invFileName;
int choice=-1;
int* init;
invFileName=(char*)malloc(sizeof(char));
invFileName[0]='\0';
init = (int*)malloc(sizeof(int));
*init=0;
while (choice!=0){
printf("Welcome to Chem-R-Us LTD database. Current company balance is %f.\nPlease select an option from ",status->balance);
printf("the following menu\nPlease enter choice.\n0) Quit.\n1) Initialize company balance and inventory nad error report files.\n");
printf("2) Save current Inventory and error status to files.\n");
printf("3) Record a sale.\n4) Record a purchase.\n");
scanf("%d",&choice);
if (choice==1) {
strcat(invFileName,initDB(init,status));
}
else if (choice==2){
if (*init==0) printf("inventory not iniialized yet. Initialize before choosing any other option.\n");
else save(status);}
else if (choice==3){
if (*init==0) printf("inventory not iniialized yet. Initialize before choosing any other option.\n");
else sell(status,invFileName);}
else if (choice==4){
if (*init==0) printf("inventory not iniialized yet. Initialize before choosing any other option.\n");
else buy(status,invFileName);}
}
return;
}
int main(){
companyStatus *status = (companyStatus*)malloc(sizeof(companyStatus));
status->balance=0.0;
status->errF = (FILE*)malloc(sizeof(FILE));
status->invF = (FILE*)malloc(sizeof(FILE));
go(status);
return 0;
}
