Thread: calling computeach students

re 425 project program 5

#include <stdio.h>
#include <conio.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <time.h>
#include <isam.h>
#include <common.h>




FILE *fp_stock_master;
FILE *fp_out;

int x=1;


RECORD_DATA *stock_rec;

int main()
{


if((fp_stock_master=fopen("A:STCKMAST.DAT","rb"))= =NULL)
{
printf("ERROR OPENING STOCK MASTER FILE\n");
exit(1);
}
else
printf("OPENING STOCK MASTER FILE\n");



while (x==1 )
{
if(fread(stock_rec,sizeof(RECORD_DATA),1,fp_stock_ master)!=1)
{
if(feof(fp_stock_master))
{ printf("end of file");x=0;strcpy(stock_rec->desc,"\0");break;}
else if(!feof(fp_stock_master)) /*else reading error*/
{printf("\nERROR READING CUSTOMER MASTER FILE - PROGRAM TERMINATED");exit(1); }
}

if(x==1)

printf("%6s %19s %02d %06ld %04d %06s %06.2f\n",stock_rec->key,stock_rec->desc,
stock_rec->supp_code,stock_rec->free_stock,stock_rec->min_stock,
stock_rec->movement_date,stock_rec->price);

}

fclose(fp_stock_master);
return 1;
}

this is trying to read my master file and it just gives a value of null for the stock_rec->key

i cant get a value for the part number at all and am having real problems with this program.

can anyone help

steve

'stock_rec' pointer is not initialized.

allocate memory for one RECORD_DATA variable and assign the pointer to it's addres

i'm not sure what you mean really,
the record data structure is defined in a header as -

typedef struct
{
char key[7];
char desc[20];
short supp_code;
long free_stock;
short min_stock;
char movement_date[7];
float price;
} RECORD_DATA;

so when i run my prog, it reads all the data correctly, but gives a value of null for the key, i don't understand at all !!!!!!!

"Hey, welcome to all, we are not alone!!!

maybe the webmaster should think on setting up a "compubunglers" forum, so we could all gripe together lol.

or set up an e-mail group. "


Hey, try www.computeachstudents.ukf.net