Question

How create a print macro for debugging in C

Answer 1

#include <stdio.h>

#define debug_print(errmsg) printf("%s:%d error: %s", __FILE__, __LINE__, errmsg)

int main(void)
{
    int n = -1;
    
    if (n == -1)
        debug_print("n = -1");
    
    return 0;
}
   
/*
run:

D:/c_programming_test/main.c:10 error: n = -1

*/

 

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