编辑代码

#include <stdio.h>
int main () {
    //JSRUN引擎2.0，支持多达30种语言在线运行，全仿真在线交互输入输出。 
    int dividend, divisor;
    scanf("%d/%d", &dividend, &divisor);
    int a = dividend;
    int b = divisor;
    int t;
    while( b>0 ){
        t = a%b;
        a=b;
        b=t;    
    }
    printf("%d/%d", dividend/a, divisor/a);
    return 0;
}