#include<bits/stdc++.h> using namespace std; int main() { int p,s; char w; cin>>p>>w>>s; switch(s){ case 0:cout<<"Divided by zero!"; return 0 ;} switch(w){case'+': cout<<p+s;break; case'-': cout<<p-s;break; case'*': cout<<p*s;break; case'/': cout<<p/s;break; default:cout<< "Invalid operator!";} return 0; }