#include <iostream>
#include <iomanip>
#include <string>
using namespace std;

void convert(int& hours, char& amPm);
void input(int& hours, int& minutes);
void output(int hours, int minutes, char amPm);
int main()
{
    int hours, minutes;
    char convAgain;
    char amPm;

    do
    {
        input(hours, minutes);
        convert(hours, amPm);
        output(hours, minutes, amPm);
        cout << endl << "Again? ";
        cin >> convAgain;
    }
    while(convAgain == 'y' || convAgain == 'Y');

    return 0;
}

void input(int& hours, int& minutes)
{
    cout << "Enter hour: ";
    cin >> hours;

    while (hours > 23 || hours < 0)
    {
        cout << "Please enter a hour between 0 and 23: " << endl;
        cin >> hours;
    }

    cout << "Enter minutes: ";
    cin >> minutes;

    while (minutes > 59  || minutes <0)
    {
        cout << "Please enter minutes between 0 and 59: " << endl;
        cin >> minutes;
    }
}

void convert(int& hours, char& amPm)
{
    if (hours > 12)
    {
        amPm = 'P';
        hours -= 12;
    }
    if (hours == 0)
    {
        hours = 12;
        amPm = 'A';
    }

    //if (hours >= 12)
        //mPm = 'P';
    //else
        //amPm = 'A';

}
void output(int hours, int minutes, char amPm)
{
    string amPmHours;
    switch(amPm)
    {
        case 'p':
        case 'P':
            amPmHours = "PM";
            break;
        case 'a':
        case 'A':
            amPmHours = "AM";
            break;
    }

    if(amPm == 'a' | amPm == 'A')
    {
        if (hours < 12)
        {
            if (minutes <= 9)
                cout << hours << ":" << setw(2) << setfill('0') <<  minutes << amPmHours;

            else
                cout << hours << ":" << minutes << amPmHours;
        }

        if (hours > 12)
        {
            if(minutes <= 9)
                cout << setw(2) << setfill('0') << hours << ":" << minutes << amPmHours;
            else
                cout << hours << ":" << minutes << amPmHours;
        }

    if (amPm == 'p' | amPm == 'P')
    {
        if (hours >= 12)
        {
            if (minutes <= 9)
                cout << hours << ":" << setw(2) << setfill('0') <<  minutes << amPmHours;

            else
                cout << hours << ":" << minutes << amPmHours;
        }

        if (hours < 12)
        {
            if(minutes <= 9)
                cout << setw(2) << setfill('0') << hours << ":" << minutes << amPmHours;
            else
                cout << hours << ":" << minutes << amPmHours;
        }

    }

}