Lesson 05: Function Overloading and Default Arguments

5.1 Function Overloading

Function overloading is a feature in C++ that you can use the same name for different functions. Function overloading can be considered as an example of a polymorphism feature in C++.

Functions in C

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Suppose there is a function that calculates the average of an array of numbers of type int. The function might look like this:

float iAverage(int array[], int length)
{
    int     sum = 0;
    int     j;

    for (j = 0; j < length; j++)
        sum += array[j];

    return (float) sum / length ;
}

5.2 Default Arguments