#include<iostream> 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 43: cout<<p+s;break; case 45: cout<<p-s;break; case 42: cout<<p*s;break; case 47: cout<<p/s;break; default : cout<<"Invalid operator!";break; } }