#include <iostream>

using namespace std;

int main ()

{
int a,b,d;

char c; 

cout << "Enter first namber " << endl;
cin >> a;

cout << "enter sign" << endl; 
cin >> c;

cout << "Enter second namber " << endl;
cin >> b;

switch (c)
{
case '+': d = a + b; break;
case '-': d = a - b; break;
case '*': d = a*b; break;
case '/': d = a/b; break;
}

cout << "result= " << d;

//system ("pause>nul");
return 0;
}