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Answer to Question #35311 in C++ for ushanandhini

Question #35311
program that takes two values of time (hr, min,Sec) and outputs their sum using constructor and operator overloading.
Expert's answer
#include <iostream>
#include <iomanip>
#include <cstring>
#include <sstream>


using namespace std;


class Time
{
private:
int hours;
int minutes;
int seconds;

public:
Time()
{
hours = minutes = seconds = 0;
}


Time(int hours, int minutes, int seconds)
{
if (hours < 0)
throw string("Invalid number of hours.");
if (minutes < 0 || minutes >= 60)
throw string("Invalid number of minutes.");
if (seconds < 0 || seconds >= 60)
throw string("Invalid number of seconds.");

this->hours = hours;
this->minutes = minutes;
this->seconds = seconds;
}

string ToString()
{
ostringstream oss;
oss.width(2);
oss.fill('0');

oss << setw(2) << setfill('0') << hours << ":"
<< setw(2) << setfill('0') << minutes << ":"
<< setw(2) << setfill('0') << seconds;
return oss.str();
}

Time operator + (const Time& time)
{
int totalSeconds = this->seconds + time.seconds;
int totalMinutes = this->minutes + time.minutes;
int totalHours = this->hours + time.hours;

totalMinutes += totalSeconds / 60;
totalHours += totalMinutes / 60;

totalSeconds %= 60;
totalMinutes %= 60;

return Time(totalHours, totalMinutes, totalSeconds);
}

static Time Input(istream& stream)
{
int h, m, s;
stream >> h >> m >> s;
return Time(h, m, s);
}
};


int main()
{
Time time_1, time_2;
bool error;

cout << "Enter first time (hours minutes seconds): ";
error = true;

while (error)
{
try
{
time_1 = Time::Input(cin);
}
catch (string e)
{
cout << " " << e << " Please re-enter (hours minutes seconds): ";
continue;
}
error = false;
}


cout << "Enter second time (hours minutes seconds): ";
error = true;

while (error)
{
try
{
time_2 = Time::Input(cin);
}
catch (string e)
{
cout << " " << e << " Please re-enter (hours minutes seconds): ";
continue;
}
error = false;
}

cout << endl;
cout << "The sum is: " << (time_1 + time_2).ToString() << endl;
}

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