Răspuns:
#include <iostream>
#include <cmath>
using namespace std;
int main()
{
int a,b,r,n,m;
cout<<"Introdu cele numitorul si numaratorul: "<<endl;
cin>>a>>b;
m=a;
n=b;
while(a!=0)
{
r=b%a;
b=a;
a=r;
}
cout<<"Fractia ireductibila este: ";
cout<<m/b<<"/"<<n/b;
}