Thread: Pointer points to struct pointer

I am not sure what the 'unresolved external error' is from. The compiler should list a specific name for the error. Could be that you are missing a library file. Maybe try changing your main() to return an int value.

Code:

int main()
{
    /* ..... code ....*/
    return 0;
}

Also, your program may compile but it is not going to run anyway. You are attempting to assign a constant value to a dereferenced pointer that has not been assigned any memory. You will have to change you code to look something like this:

Code:

#include <stdio.h> 
#include <malloc.h>

//pointer has pointers 

int main() 
{ 
    struct int_pointers 
    { 
        int *ptr1, *ptr2; 
    }; 

    struct int_pointers *point, ptrs; //create 2 objects. 

    point = &ptrs;

    int i1 = 123, i2 = 87, i3 = 45; 

    (*point).ptr1 = (int *)malloc(sizeof(int));
    *(*point).ptr1 = 12; //dereference point and use dot notation 

    point->ptr2 = &i2; //pointer points pointer 

    printf("i1 = %d, point->ptr1 = %d\n", i1, *(*point).ptr1); //12 

    printf("i2 = %d, point->ptr2 = %d\n", i2, *point->ptr2); //87

    free ((*point).ptr1);

    return 0;
}

David

LIBCD.lib(wincrt0.obj) : error LNK2001: unresolved external symbol _WinMain@16

This means that the compiler is looking for the WinMain() function which is the driver for Windows-based applications, i.e. you are trying to build a Win32 Application (Windows). You need to change to a Win32 Console Application.
The best thing to try is to create a new Win32 Console Application and add your existing .cpp file to the new project. This should clear it up.

David