求告知求最大公约数提交为啥答案错误

Question

#include<stdio.h>
int gcd(int x,int y){
    if(y==0)
        return x;
    else
        return (y,x%y);
}
int main(){
    int a,b,c;
    scanf("%d %d",&a,&b);
    if(a>b){
        c=a;
        a=b;
        b=c;
    }
    printf("%d\n",gcd(a,b));
    return 0;
}

Answer 1

修改见注释，供参考：

#include<stdio.h>
int gcd(int x,int y){
    if(y==0)
        return x;
    else
        return gcd(y,x%y); //修改
}
int main(){
    int a,b,c;
    scanf("%d %d",&a,&b);
    if(a<b){              //修改
        c=a;
        a=b;
        b=c;
    }
    printf("%d\n",gcd(a,b));
    return 0;
}