Default Memberwise Assignment

Default Memberwise Assignment

·        The assignment operator (=) can be used to assign an object to another of the same type.

·        Objectsmay be passed by value to or returned by value from functions. C++ creates a new object and uses a copy constructor to copy the original object’s values into the new object.

·        For each class, the compiler provides a default copy constructor that copies each member Of the original object into the corresponding member of the new object.

What is the output of the following program? //time.h

class Time

{

public:

Time (int h=12, int m=10, int s=11); //constructor with default arguments

~Time();

voidsetTime (int h, int m, int s);

void display();

private:

int hour; int min; int sec;

};

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//t.cpp

#include "t.h"

#include <iostream>

using namespace std;

Time::Time (int h, int m, int s) { hour=h; min=m; sec=s; }

Time::~Time () { };

void Time::setTime (int h, int m, int s) { hour=h; min=m; sec=s; }

void Time::display () { cout<<hour<<":"<<min<<":"<<sec<<" "; }

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//mainTime.cpp

#include "t.h"

#include <iostream>

using namespace std;

void main ()

{

Time t1;

t1.display();

t1.setTime (10, 25, 30);

Time t2;

t2 = t1; //memberwise assignment

t2.display();

}