31_constructor_overloading.cpp

#include<iostream>
using namespace std;

class Complex{
    int a, b;
    public:

    Complex(){               //   <-----
        a=0;                 //         |
        b=0;                 //         |
    }                        //         |
    Complex(int x, int y){   //   <--------------- Constructor Overloading
        a=x;                 //         |
        b=y;                 //         |
    }                        //         |
    Complex(int x){          //   <-----
        a=x;
        b=0;
    }

    void printData(){
        cout<<"The number is "<<a<<" + "<<b<<"i"<<endl;
    }
};

int main(){

    Complex c1(4, 7);
    c1.printData();

    Complex c2(2);
    c2.printData();
    
    Complex c3;
    c3.printData();
    
    return 0;
}