学习历程-LCM

#include<stdio.h> int fun(int a,int b) { if(b==0) return a; else return fun(b,a%b); } int main() { int a,b,t,a1,b1; while(1) { scanf("%d%d",&a,&b); a1=a;b1=b; while(b1!=0) { t=b1; b1=a1