分）

#include <stdio.h>

int main(void)

{

int a, b;

int tmp, gcl, lcm;

printf("Please input two numbers:");

scanf("%d %d", &a, &b);

int lcm_tmp = a * b;

if(a==b){

gcl=lcm=a;

printf("gcl=%d, lcm=%d\n", gcl, lcm);

return 0;

}

if(a<b){

a=a+b;

b=a-b;

a=a-b;

}

while((tmp = a%b)!=0){

a = b;

b = tmp;