Question

Create a class called time that has three data members hours, minutes, and seconds. The class has the following member functions:

- Overloaded Constructors

- Display function to display it, in 11:59:59 format.

- SetTime()

- IsValid(): Check if the time is valid or not

- AddTime(Time t1, Time t2): Add two time values passed as a parameter leaving the result in third time variable.

- Increment(): Tells what will be time after a second

- Decrement(): Tells what was the time a second earlier

In C++ language

Answer 1

SOURCE CODE:

#include<iostream>

using namespace std;

class Time //class Time

{

private:

int hours;

int minutes; //member variables hours minutes seconds

int seconds;

public:

Time() //default constructer which sets all to 0

{

hours = 0;

minutes = 0;

seconds = 0;

}

Time(int h, int m, int s) //overloaded constructor which accepts hours minutes and seconds

{

hours = h;

minutes = m;

seconds = s;

}

void setTime(int h,int m,int s){ //setTime() methods which accepts hours minutes and seconds

hours = h;

minutes = m;

seconds = s;

}

void display() //display method which displays time in 11:59:59 format

{

if(hours<10) //if hours < 10 then add extra 0

cout<<"0"; //printing 0

cout<<hours<<":"; //printing hours

if(minutes<10) //if minutes <10 add extra 0

cout<<"0"; //printing 0

cout<<minutes<<":"; //printing minutes

if(seconds<10) //if seconds < 10 add extra 0

cout<<"0"; //printing 0

cout<<seconds<<endl; //printing seconds

}

void isValid(){ //isValid() methods which tells the time is valid or not

if(hours<0 || hours>23){

cout<<"Time is Invalid"<<endl;

}

else if(minutes<0 || minutes>59){

cout<<"Time is Invalid"<<endl;

}

else if(seconds<0 || seconds>59){

cout<<"Time is Invalid"<<endl;

}

else{

cout<<"Time is valid"<<endl;

}

}

void Increment(){ //Increment method which increments time by 1 seconds

seconds=seconds+1;

if(seconds>59){

seconds=0;

minutes=minutes+1;

}

if(minutes>59){

minutes=0;

hours=hours+1;

}

if(hours>23){

hours=0;

}

}

void Decrement(){ //Decrement() method which decrement time by 1 second

seconds=seconds-1;

if(seconds<0){

seconds=59;

minutes=minutes-1;

}

if(minutes<0){

minutes=59;

hours=hours-1;

}

if(hours<0){

hours=23;

}

}

Time AddTime(Time t1, Time t2) //AddTime method which adds two times

{

int finalHours = t1.hours + t2.hours;

int finalMinutes = t1.minutes + t2.minutes; //first add two hours minutes and seconds

int finalSeconds = t1.seconds + t2.seconds;

if (finalHours > 23) { //check if hour >23 if so then

finalHours -= 24;

}

if (finalMinutes > 59) { //check if minutes>59 if so then

finalMinutes -= 60;

finalHours += 1;

}

if (finalSeconds > 59) { //check if seconds>59 if so then

finalSeconds -= 60;

finalMinutes += 1;

}

Time t3(finalHours,finalMinutes ,finalSeconds);

return t3;

}

};

int main()

{

//testing code

Time t1(12,40,30);

t1.display();

t1.isValid();

Time t2(21,23,43);

t2.display();

t2.isValid();

Time t3=t1.AddTime(t1, t2);

t3.display();

return 0;

}

SCREENSHOT:

OUTPUT: