structure problem (C)

Repli

I'm writing a program to use pointers to access structure elements.. When I run this code I get the error "STRUCT-Q2 caused an invalid page fault in module MSVCRT.DLL at 015f:780268b2."
And in FreeBSD I get "Segmentation fault (core dumped)", after I enter a value for 'a' for the second time - anyone know what the problem is? Thx in advance for any help

Here is the code:

#include <stdio.h>
#include <stdlib.h>
main( int argc, char *argv[] )
{
        struct data
        {
                int a;
                int b;
        };
        
        typedef struct data DATA;
        DATA d;
        DATA *p;
        p = &d;

        printf ("Assign number to a: ");
        scanf ("%d", &d.a);
        printf ("Assign number to b: ");
        scanf ("%d", &d.b);
        printf ("a is %d and b is %d \n \n", d.a, d.b);

        printf ("Assign number to a: ");
        scanf ("%d", p -> a);
        printf ("Assign number to b: ");
        scanf ("%d", p -> b);
        printf ("c is %d and d is %d \n \n", d.a ,d.b);

        printf ("Assign number to a: ");
        scanf ("%d", (*p).a);
        printf ("Assign number to b: ");
        scanf ("%d", (*p).b);
        printf ("a is %d and b is %d \n \n", d.a, d.b);

}

hussey

me wrong ..

jessy

printf ("Assign number to a: ");
scanf ("%d", &d.a);
printf ("Assign number to b: ");
scanf ("%d", &d.b);
printf ("a is %d and b is %d \n \n", d.a, d.b);

printf ("Assign number to a: ");
scanf ("%d", &p->a);
printf ("Assign number to b: ");
scanf ("%d", &p->b);
printf ("c is %d and d is %d \n \n", d.a ,d.b);

printf ("Assign number to a: ");
scanf ("%d", &(*p).a);
printf ("Assign number to b: ");
scanf ("%d", &(*p).b);
printf ("a is %d and b is %d \n \n", d.a, d.b);

You Need to put the & operator in the scanf function.

you have only put it in the first time you got some data from the screen.

Repli

D'oh

DeadBankClerk

[php]
printf ("Assign number to a: ");
scanf ("%d", p).a);
printf ("Assign number to b: ");
scanf ("%d", p.b);
printf ("a is %d and b is %d \n \n", d.a, d.b);
[/php]

&(*p) cancels out to just p.