关于c语言scanf出现错误

Question

#include <stdio.h>
#include <stdlib.h>
int gcd(int a, int b) {
    int r;
    r = a % b;
    while (r != 0) {
        a = b;
        b = r;
        r = a % b;

    }
    return b;
}


int main()
{
    int  n = 0;int m=0;
    scanf_s("%d%d", n,m);
    gcd(n, m);
    printf("%d", m);
    return 0;
}

Answer 1

scanf_s参数是指针，所以需要传入指针。scanf_s("%d%d",&n,&m);