uno

std::string ReversePolandNotation::makeCalculations(std::string const &val1, std::string const &val2, char const sign) const
{
    if (isDigit(val1) && isDigit(val2))
    {
        Operand<int> operand1(std::atoi(val1.c_str()));
        Operand<int> operand2(std::atoi(val2.c_str()));
        switch (sign)
        {
        case '*':
            return std::to_string((operand1 * operand2).getValue());
            break;
        case '-':
            return std::to_string((operand1 - operand2).getValue());
            break;
        case '/':
            return std::to_string((operand1 / operand2).getValue());
            break;
        case '+':
            return std::to_string((operand1 + operand2).getValue());
            break;
        }
    }
    else if(isDigit(val1) && isAlpha(val2))
    {
        Operand<int> operand1(std::atoi(val1.c_str()));
        Operand<std::string> operand2(val2);
        switch (sign)
        {
        case '*':
            return (operand1 * operand2).getValue();
            break;
        case '+':
            return (operand1 + operand2).getValue();
            break;
        }
    }
    else if (isAlpha(val1) && isAlpha(val2))
    {
        Operand<std::string> operand1(val1);
        Operand<std::string> operand2(val2);
        switch (sign)
        {
        case '+':
            return (operand1 + operand2).getValue();
            break;
        }
    }
    else if(isAlpha(val1) && isDigit(val2))
    {
        Operand<std::string> operand1(val1);
        Operand<int> operand2(std::atoi(val2.c_str()));
        switch (sign)
        {
        case '*':
            return (operand1 * operand2).getValue();
            break;
        case '+':
            return (operand1 + operand2).getValue();
            break;
        }
    }
    return "#Calculation Error";
}