C++24小时制转换成12小时制

英文题目（老师给的原版题目）：

Write a program that converts from 24-hour notation to 12-hour notation.For example,it should convert 14:25 to 2:25 PM.The input is given as two integers.There should be at least three functions,one for input,one to do the conversion,and one for output.Record the AM/PM information as a value of type char,’A’ for AM and ‘P’ for PM.Thus,the function for doing the conversions will have a call-by-reference formal parameter of type char to record whether it is AM or PM.(The function will have other parameters as well.)Include a loop that lets the user repeat this computation for new input values again and again until the user says he wants to end the program.

中文题目（简单翻译一下）：

将24小时制转换为12小时制的程序。例如，它应该将14:25转换为2:25 PM。输入是两个整数。应该至少有三个函数，一个用于输入，一个用于转换，一个用于输出。将AM/PM信息记录为char类型的值，’ A '表示AM， ’ P '表示PM。因此，用于进行转换的函数将具有一个char类型的按引用调用形参，以记录它是AM还是PM。(该函数还有其他参数。)包含一个循环，让用户对新的输入值一次又一次地重复这个计算，直到用户说他想结束程序。

代码：

#include <iostream>

using namespace std;
int time_24_hour,time_24_minute,time_12_hour,time_12_minute;

void Input(){
   
    cout<<