Test true and false with type 'bool' and 'int'

[stdbool.h] Test true and false with type 'bool' and 'int' .c

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>

#define test_bool(var) _test_bool(var, #var)
void _test_bool(bool var, const char * var_name) {
    printf("%s => %d\n", var_name, var);
    printf("true  ? %s\n",   true  == var ? "YES" : "NO");
    printf("false ? %s\n\n", false == var ? "YES" : "NO");
}

#define test_int(var) _test_int(var, #var)
void _test_int(int var, const char * var_name) {
    printf("%s => %d\n", var_name, var);
    printf("true  ? %s\n",   true  == var ? "YES" : "NO");
    printf("false ? %s\n\n", false == var ? "YES" : "NO");
}

int main() {
    puts("test_bool:\n");
    test_bool(-1);
    test_bool(1);
    test_bool(0);
    test_bool(10);
    puts("-----------\n");

    puts("test_int:\n");
    test_int(-1);
    test_int(1);
    test_int(0);
    test_int(10);
    return EXIT_SUCCESS;
}

/*
 * Result:
 *
 * test_bool:
 *
 * -1 => 1
 * true  ? YES
 * false ? NO
 *
 * 1 => 1
 * true  ? YES
 * false ? NO
 *
 * 0 => 0
 * true  ? NO
 * false ? YES
 *
 * 10 => 1
 * true  ? YES
 * false ? NO
 *
 * -----------
 *
 * test_int:
 *
 * -1 => -1
 * true  ? NO
 * false ? NO
 *
 * 1 => 1
 * true  ? YES
 * false ? NO
 *
 * 0 => 0
 * true  ? NO
 * false ? YES
 *
 * 10 => 10
 * true  ? NO
 * false ? NO
 */