Chapter 3.6: Overloading Functions

Adapted from: “Object-Oriented Programming Using C++” by Ira Pohl (Addison- Wesley)

Program that demonstrates overloading functions in C++¶

// Average the values in an array
#include <iostream>

using namespace std;

double avg_arr(const int a[], int size)
{
    int sum = 0;

    for (int i = 0; i < size; ++i)
        sum += a[i];        // performs int arithmetic
    return (static_cast<double>(sum) / size);
}

double avg_arr(const double a[], int size)
{
    double sum = 0.0;

    for (int i = 0; i < size; ++i)
        sum += a[i];
    return (sum / size);
}

int main()
{
    int w[5] = { 1, 2, 3, 4, 5 };
    double x[5] = { 1.1, 2.2, 3.3, 4.4, 5.5 };

    cout << avg_arr(w, 5) << " int average" << endl;
    cout << avg_arr(x, 5) << " double average" << endl;
}

Compile and Execute the Program¶

The above program is compiled and run using Gnu Compiler Collection (g++):

import os
root_dir = os.getcwd()

code_dir = root_dir + "/" + "Cpp_Code/Chapter_3_6_Overloading_Functions"

ch_dir_stat = os.chdir(code_dir)

build_command = os.system("g++ avg_arr.cpp -w -o avg_arr")

exec_status = os.system("./avg_arr")

3 int average
3.3 double average