```cpp
#include<bits/stdc++.h>
using namespace std;
int main()
{
long long a,b,c,d,e,f;
cin>>a>>b>>c;
if(a>c){e=a;f=c;}
if(a==c){e=a;f=c;}
if(a<c){e=c;f=a;}
d=e%f;
while(d!=0)
{
e=f;
f=d;
d=e%f;
}
cout<<e<<"/"<<f;
return 0;
}
```
@[SfumatoCannon_](/space/show?uid=125429)
by KasuganoSora @ 2018-12-01 17:29:07
@[p_1526967984](/space/show?uid=128276)
```cpp
cout<<f<<"/"<<e;
```
试试看
by SfumatoCannon_ @ 2018-12-01 17:31:26