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

void print_int_bool(int val)
{
    int i = val;
    bool b = val;
    printf("int = %2d -> bool = %2d\n", i, b);
}

int main()
{
    print_int_bool(-1);
    print_int_bool(0);
    print_int_bool(1);
    print_int_bool(2);

    return 0;
}