#include
using namespace std;
int main() {
cout << "Введите два числа: ";<br> double n1,n2;
cin >> n1 >> n2;
cout << "Введите знак операции: ";<br> char op;
cin >> op;
switch(op) {
case '+':
cout << n1+n2 << endl;<br> break;
case '-':
cout << n1-n2 << endl;<br> break;
case '*':
cout << n1*n2 << endl;<br> break;
case '/':
cout << n1/n2 << endl;<br> break;
default:
cout << "wrong operation" << endl;<br> break; }
return 0;
}