C++ :: Get Variable's Name

How to print a variables name instead of its value? (not just by giving the name yourself)

This can be easily done with a #define pre-processor directive. As #define treats the preceding expression as cstring, it is possible to get the variables name as a string. Look below:

#include <stdio.h>

#define getVarName(varName,holder) sprintf(holder, "%s", #varName)

int main() {
    int var = 100; // just any type of identifier
    char name[100]; // it will get the variables name
    getVarName(var, name);
    puts(name);
    return 0;
}

It will print "var" instead of "100" or something other. I saw it years ago somewhere I can't remember now. Today, it suddenly struck me and I think it might be useful who knows when...