Implementation of Overloaded Functions

In my header file, I have this:

std::string StringExtend(const std::string Source, const unsigned int Length, const bool Reverse);
std::string StringExtend(const std::string Source, const unsigned int Length);

In my cpp file, I have this:

std::string Cranberry::StringExtend(const std::string Source, const unsigned int Length, const bool Reverse)
{
    unsigned int StartIndex = (Source.length() - 1) * Reverse;
    short int  Increment = 1 - (Reverse * 2);

    int Index = StartIndex;

    std::string Result;

    while (Result.length() < Length)
    {
        if (Reverse) Result = Source.at(Index) + Result;
        else Result += Source.at(Index);

        Index += Increment;

        if (!InRange(Index, 0, Source.length() - 1)) Index = StartIndex;
    }

    return Result;
}

std::string Cranberry::StringExtend(const std::string Source, const unsigned int Length)
{
    return StringExtend(Source, Length, false);
}

As you can see, the second form of the function is the exact same t开发者_如何学Pythonhing with the Reverse argument omitted. Is there a way to condense this, or do I have to have a function prototype and definition for each form?

Use a default parameter for your Reverse parameter.

std::string StringExtend(const std::string & Source, unsigned int Length, bool Reverse = false);

Get rid of the second function:

std::string StringExtend(const std::string & Source, unsigned int Length);

You could set a default value for the "optional" parameter, like const bool Reverse = false.

Yes use default argument for bool parameter. For example std::string StringExtend(const std::string Source, const unsigned int Length, const bool Reverse = false); Then there is no need of 2nd function