#include<iostream> using namespace std; int main() { int a,c; char b; cin>>a>>b>>c; switch (c) {case 0:cout<<"Divided by zero!"; return 0; } switch (b) { case '+':cout<<a+c;break; case '-':cout<<a-c;break; case '*':cout<<a*c;break; case '/':cout<<a/c;break; default:cout<<"Invalid operator!";break; } return 0; }