/*
Date: 20 Feb 2019
Name: Matthew Strapp
Student ID number: 5449340
Course number: EE1301
Term: Spring 2019
Lab/assignment number: Homework 2B
Short Program Description: Time Travel Calculator
*/
//15

#include <iostream>
using namespace std;
int main () {
  
  bool change12=0, foo=0; //Workaround to prevent unneeded if statements
  char Time, travel; //"time" is reserved by C++, "Time" is not
  int hourOG, hourChange, hourNew, intervalChange=0, timeChange=1;
  cout << "Enter current time (A for AM, P for PM): ";
  cin >> hourOG >> Time;
  cout << "How many hours forward or backward do you want to move the clock (F for forwards, B for backward): ";
  cin >> hourChange >> travel;
  for (int i=hourChange; i>=0; i--) {
    if (i!=0){
    intervalChange++;
    } do {
    if (travel=='B' && hourOG-intervalChange<0){
      if (hourChange<12)
      intervalChange=12-hourChange;
      else
      intervalChange=hourChange-12;
    }
    } while (intervalChange>12);
    if (intervalChange>=12) {
        //if (intervalChange !=12)    {i
      intervalChange=0;
      timeChange++;
      //change12=1;
    }
  }
  
/*  if (hourOG+hourChange>=12 || hourOG-hourChange<=0) {
    if (hourOG!=0 ^ hourOG!=12) {
       hourOG-=12;
    }
    if (hourChange>12) {
      do {
        hourChange-=12;
        timeChange+=1;
        } while (hourChange >=11);
  }
    change12=1;
  }
*/

  for (timeChange; timeChange>1; timeChange--) {
    //if (change12) {
      if (Time=='A') {
        Time+=15;
        foo=true;
      }
      if (Time=='P' && !foo) {
        Time-=15;
      }
      foo=0;
    //}
  }
  
  if (travel=='F') {
    hourNew=hourOG+intervalChange;
  }
  if (travel=='B'){
    hourNew=hourOG+intervalChange;
  }
  //Deprecated, doesn't work
  //hourNew=hourOG+intervalChange;
  cout << "The new time is: " << hourNew << " " << Time << "M" << endl;
  return 0;
  
  
}