真分数

#include<stdio.h>int yue(int a, int b){    if (b != 0) yue(b, b%a);    else return a;} int main() {     int fz, fm;     while (scanf("%d/%d",&fz,&fm) != EOF)     {         int a = yue(fz, fm);         printf("%d/%d\n", fz / a, fm / a);     }     return 0;}