problem using fprintf
- by shiran bar
I'm trying to print to a text file numerous variables yet it doesn't work.
I checked and verified that i write it in the correct syntax.
I also checked the return value and it's positive therefore i know it did write to the file, however when i open the file it's empty.
I would be happy for some help.
This is the code:
I initiate DynsaleDayPtr in the main:
FILE* DynsaleDayPtr = CreateTextFiles("sale_day.txt");
Create function:
FILE* CreateTextFiles (char* fileName)
{
FILE* saleFilePtr=NULL;
if((saleFilePtr=fopen(fileName,"a+"))==NULL)
printf("File couldn't be opened\n");
return saleFilePtr;
}
The call to the function TextAddSale is done from a function that is called in the main:
TextAddSale(DynSaleDayPtr,dynNumOfRecords);
Bool TextAddSale (FILE* DynsaleDayPtr, int* dynNumOfRecords)
{
char id[6];
char name [50];
char priceChar[20];
char* tmp = NULL;
int price=-1;
DynamicRecord * newRec=NULL;
scanf("%s%s%s",id,name,priceChar);
newRec = (DynamicRecord *)malloc(sizeof(DynamicRecord));
if (newRec == NULL)
return False;
tmp = (char*)malloc(strlen(name)+1);
if (tmp == NULL)
{
free (newRec);
return False;
}
strcpy(tmp,name);
newRec->productName = tmp;
strcpy(newRec->productId, id);
newRec->productPrice=atoi (priceChar);
if (fprintf(DynsaleDayPtr,"%d %s %s %d", strlen(newRec->productName),
newRec->productId, newRec->productName, newRec->productPrice)>0)
{
*dynNumOfRecords=(*dynNumOfRecords)+1;
return True;
}
}
thanks!
