#include <iostream>
#include <math.h>

int main() {

    float first_Number = 0;
    float second_Number = 0;
    char Op = ' '; //operator

    std::cout << "~> ";
    std::cin >> first_Number >> Op >> second_Number;

    switch (Op) {

    case '+':
        std::cout << first_Number << Op << second_Number << " = " << (first_Number + second_Number) << std::endl;
        break;
    case '-':
        std::cout << first_Number << Op << second_Number << " = " << (first_Number - second_Number) << std::endl;
        break;
    case 'x':
        std::cout << first_Number << Op  second_Number <<  =   (first_Number * second_Number) << std::endl;
        break;
    case '*':
        std::cout << first_Number << Op  second_Number <<  =   (first_Number * second_Number) << std::endl;
        break;
    case '/':
        std::cout << first_Number << Op  second_Number << " = " << (first_Number / second_Number) << std::endl;
        break;
    case '%':
        std::cout << first_Number << Op  second_Number << " = " << (static_cast<int>(first_Number) % static_cast<int>(second_Number)) << std::endl;
        break;
    case '^':
        std::cout << first_Number << Op  second_Number << " = " << (pow(first_Number, second_Number)) << std::endl;
        break;
    default:
        std::cout << "Error.\n << Op << " not found :(" << std::endl;
    }

    std::cin.get();
    std::cin.get();
}