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C  : Compiler Error While Comparing Pointers using Macros
ISO C++ forbids comparison between pointer and integer

#define DWASSERT(condition,printstatement)  if(!condition){ printf(printstatement); assert(condition); }

#include <stdio.h>

int main()
{
    int target = 0;
    int* ptr1 = &target;
    int* ptr2 = &target;

    //Normal comparison works fine
    if(ptr1 == ptr2)
        printf("Equal");

    //Comparison using Macro generates compiler
    //error on the next line
    DWASSERT(ptr1 == ptr2, "Pointers not equal!n");
    return 0;
}

#define DWASSERT(condition,printstatement)  if(!(condition)){ printf...

if(!condition)

if(! (condition) )

#define DWASSERT(condition,printstatement)  if(!(condition)){ printf(printstatement); assert(condition); }

if (!ptr1 == ptr2) { ... }

if ((!ptr1) == ptr2) { ... }

int i = -1;

DWASSERT(++i, "will I assert?");

DWASSERT((ptr==ptr2), "Pointers not equal!n");