default_arg_constructor.cpp

#include <iostream>
using namespace std;

class Simple
{
    int data1;
    int data2;
    int data3;

public:
    // Constructor with default values for b and c
    Simple(int a, int b = 9, int c = 8)
    {
        data1 = a;
        data2 = b;
        data3 = c;
    }

    void printData();
};

void Simple::printData()
{
    cout << "The value of data1, data2 and data3 is " << data1 << ", " << data2 << " and " << data3 << endl;
}

int main()
{
    Simple s1(1);          // Uses default values for b and c
    Simple s2(1, 2);       // Uses default value for c
    Simple s3(1, 2, 3);    // No default values used

    s1.printData();
    s2.printData();
    s3.printData();

    return 0;
}