Строки

#include <iostream>
#include <string>
using namespace std;
 
void String() 
{
 
    cout << " Operation = ";
 
    string First_Number;
    cin >> First_Number;
    double Get_First_Number = stoi(First_Number);
 
    char Symbol;
    cin >> Symbol;
 
    string Second_Number;
    cin >> Second_Number;
    double Teg_Second_Number = stoi(Second_Number);
 
    switch (Symbol) {
 
    case '+':
        cout << " Result = " << Get_First_Number + Teg_Second_Number << endl;
        break;
    case '-':
        cout << " Result = " << Get_First_Number - Teg_Second_Number << endl;
        break;
    case '*':
        cout << " Result = " << Get_First_Number * Teg_Second_Number << endl;
        break;
    case '/':
        cout << " Result = " << Get_First_Number / Teg_Second_Number << endl;
    case '%':
        cout << " Residual = " << fmod(Get_First_Number, Teg_Second_Number) << endl;
    default:
        cout << " Wrong Operation: ";
    }
 
}
 
 
int main() 
{
 
    String();
 
    system("pause");
    return 0;
}