Question

Q3 Develop a Time class which encapsulates hour ,minute and second data members. Provide overloaded +, -, ++ and - - overloaded operators for Time.

Answer 1

I have given the program below. I hope it will help you, if you have any query then tell me.

Take care

Programs:

#include <iostream>

#include <math.h>

using namespace std;

class Time

{

private:

int second;

int minute;

int hour;

public:

//Paramiterised Constructor

Time(int h, int m, int s=0) {

second = s;

minute = m;

hour = h;

}

//Default Constructor

Time (){

second = 0;

minute = 0;

hour = 0;

}

//Notice nothing inside barcket which indicates pre-increment ++.

Time operator ++ ()

{

Time temp;

//as in the given question for the test data there is no "second" value I am incrementing "minute" as functionality of ++. If wanted same can be done to increment second value also

temp.minute = ++minute;

temp.hour = hour;

if(minute == 60){

minute = 0;

temp.minute = 0;

hour = hour + 1;

temp.hour = temp.hour + 1;

}

return temp;

}

// Notice int inside barcket which indicates post-increment ++ .

Time operator ++ (int)

{

Time temp;

temp.minute = minute++;

temp.hour = hour;

if(minute == 60){

minute = 0;

hour = hour + 1;

}

return temp;

}

// Method to set variables of Time

void setvalue(int h, int m, int s=0) {

second= s;

minute = m;

hour = h;

}

// Method to get Time

Time getvalue(){

Time temp;

temp.hour=hour;

temp.minute=minute;

temp.second=second;

return temp;

}

// Method to print Time

void printvalue()

{ cout << "\n Time = "<< hour << " H " << minute <<" M " <<second << " S " <<"\n"; }

};

//main function

int main()

{

Time T1(11,59), T2(10,40);  

cout<< "value of T1";

T1.printvalue();

cout<< "value of T2";

T2.printvalue();

// Operator function is called, only then value of obj is assigned to obj1

Time T3 = ++T1;

cout<< "value of T1 after operator function";

T1.printvalue();

cout<< "value of T3, ie. assigned value of T1 at pre-increment";

T3.printvalue();

// Assigns value of obj to obj1, only then operator function is called.

Time T4 = T2++;

cout<< "value of T2 after operator function";

T2.printvalue();

cout<< "value of T4, ie. assigned value of T2 at post-increment ";

T4.printvalue();

return 0;

}