#include <stdio.h>

int gcd(int a, int b)
{
    return (b == 0) ? a : gcd(b, a % b);
}

int show_simplified(int a, int b)
{
    if (!a || !b) return printf("a, b should not be zero!\n");
    int sign = (a > 0) ^ (b > 0);
    a = (a > 0) ? a : -a;
    b = (b > 0) ? b : -b;
    int d = gcd(a, b);
    return printf("simplified is: %s%d/%d\n", sign ? "-" : "", a / d, b / d);
}

int main()
{
    show_simplified(123, 333);
    return 0;
}