7RDZ57 - Online C Compiler & Debugging Tool

#include <stdio.h>

int main() {
    int x, y;


    if (scanf("%d", &x) != 1 || x <= 0) {

        return 1;
    }

    if (scanf("%d", &y) != 1 || y <= 0) {

        return 1;
    }


    while (x != y) {
        if (x > y) {

            x = x - y;
        } else {

            y = y - x;
        }
    }


    printf("最大公約数は %d です。\n", x);

    return 0;
}