#include<stdio.h>
int gcd(int a,int b)
{
if(b!=0) gcd(b,a%b);
else return a;
}
int lcm(int a,int b)
{
return a*b/gcd(a,b); //a/gcd(a,b)*b防溢出
}
int main()
{
int a,b;
while(scanf("%d%d",&a,&b)!=EOF){
printf("%d %d\n",gcd(a,b),lcm(a,b));
}
return 0;
}
原文：http://www.cnblogs.com/yzm10/p/7011007.html