solve the conversion of time in c++

Question

Contains a class “time24”. The class contains hr, mn and sec integer data members. The class should have a constructor to assign initial values, a function to input time from user in 24 Hour format and a function to display time in 24 Hour format. The program should also contain “time12” class having proper data members, a casting function to convert the time from 12 Hour (PM/AM) to 24 Hour format. It also has functions to input and display time in 12 Hour format. A main function should call all defined functions by creating the object of both classes.

Answer 1

#include <iostream>
#include <math.h>

using namespace std;


class Time24
{

private:
int hour;
int minute;
int second;

public:

Time24 (int hr, int min, int sec)
{
hour = abs(hr)%24;
minute = abs(min)%60;
second = abs(sec)%60;

}

int GetHour() { return(hour); }
int GetMinute() { return(minute); }
int GetSecond() { return(second); }


void Display()
{
if (hour<10)
{
std::cout << "0"<< hour;
}
else
{
std::cout << hour ;
}

std::cout << ":";

if (minute < 10)
{
std::cout << "0"<< minute;
}
else
{
std::cout<< minute ;
}
std::cout << ":";

if (second <10)
{
std::cout<< "0" << second << endl;
}
else
{
std::cout << second << endl;
}

}

void Input()
{
int hr, min, sec;

std::cout << " Please input the hour :>";
std::cin >> hour;
std::cout << " Please input the minute :> ";
std::cin >> minute;
std::cout << " Please input the second :>";
std::cin >> second;

hour = abs(hour)%24;
minute = abs(minute)%60;
second = abs(second)%60;

}


}; //class Time24


class Time12
{

private:
int hour;
int minute;
int second;
bool AM_PM_flag;

public:

Time12 (int hr=12, int min=0, int sec=0, bool am_pm=false)
{
hour = abs(hr)%24;
hour %= 12;
if (hour==0) { hour = 12; }
minute = abs(min)%60;
second = abs(sec)%60;
AM_PM_flag = am_pm;

}

Time12() { hour=12; minute=second=0; AM_PM_flag = false; }

int GetHour() { return(hour); }
int GetMinute() { return(minute); }
int GetSecond() { return(second); }
bool Get_AM_PM() { return(AM_PM_flag); }


void Display()
{
if (hour<10)
{
std::cout << "0"<< hour;
}
else
{
std::cout << hour ;
}

std::cout << ":";

if (minute < 10)
{
std::cout << "0"<< minute;
}
else
{
std::cout<< minute ;
}
std::cout << ":";

if (second <10)
{
std::cout<< "0" << second;
}
else
{
std::cout << second;
}

std::cout << " ";
if (AM_PM_flag)
{
std::cout << "PM" << endl;
}
else
{
std::cout <<"AM" << endl;
}

}

void Input()
{
int hr, min, sec;
int iAmPm;

std::cout << " Please input the hour :>";
std::cin >> hour;
std::cout << " Please input the minute :> ";
std::cin >> minute;
std::cout << " Please input the second :>";
std::cin >> second;

hour = abs(hour)%24;
hour %= 12;
if (hour==0) { hour = 12; }
minute = abs(minute)%60;
second = abs(second)%60;

do
{
std:cout << " Input 1 for PM or 0 for AM :>";
std::cin >> iAmPm;
} while ((iAmPm<0) || (iAmPm>1));

AM_PM_flag = (iAmPm == 0) ? false : true;


}


}; //class Time12


Time24 Convert12to24 ( Time12 time12)
{


int hr = time12.GetHour();
int min = time12.GetMinute();
int sec = time12.GetSecond();
bool AmPmFlag = time12.Get_AM_PM();

if (AmPmFlag) { hr += 12; }

Time24 time24Return(hr,min,sec);
return ( time24Return);


}


Time12 Convert24to12 (Time24 time24)
{

bool AmPmFlag = false;
int hr = time24.GetHour();
int min = time24.GetMinute();
int sec = time24.GetSecond();

if (hr > 12)
{
hr -= 12;
AmPmFlag = true;
}
else
{
AmPmFlag = false;
}

Time12 time12Return ( hr, min, sec, AmPmFlag);
return(time12Return);

}

int main( int arc, char * argv[])
{
Time24 myTime24( 15,33,33);
myTime24.Display();

Time24 yourTime24(0,0,0);
yourTime24.Input();
yourTime24.Display();

Time12 myTime12 ( 3,33,33, true);
myTime12.Display();

Time12 yourTime12(12,0,0,false);
yourTime12.Input();
yourTime12.Display();

Time24 time24copy = Convert12to24(yourTime12);
std::cout << "converted time from 12 to 24: >";
time24copy.Display();

Time12 time12Copy = Convert24to12(yourTime24);
std::cout << "converted time from 24 to 12: >";
time12Copy.Display();


}