#include <stdio.h>
int hcf(int n1, int n2);
int main()
{
int n1, n2;
printf("输入两个正整数: ");
scanf("%d %d", &n1, &n2);
printf("%d 和 %d 的最大公约数为 %d", n1, n2, hcf(n1,n2));
return 0;
}
int hcf(int n1, int n2)
{
if (n2 != 0)
return hcf(n2, n1%n2);
else
return n1;
}