FirstCalculatorChallenge.cpp

#include <iostream>
#include <sstream>

int main()
{
    //extend this calculator to be able to evaluate eny postfix expression
    //building a simple calculator
    std::string input("2 3 -");
    std::stringstream tokens(input);
    int a = 0, b = 0;
    tokens >> a;
    tokens >> b;
    char op = 0;
    tokens >> op;

    switch(op)
    {
        case('+'):
            std::cout<<(a + b)<<"\n";
        break;
        case('-'):
            std::cout<<(a - b)<<"\n";
        break;
        //add / and * operators
    }
    return 0;
}