分别用三个函数：输入（time_input）、输出（time_output）、转换(time_change)函数

复制代码 代码如下:

#include<iostream>

#include<cstdlib>

using namespace std;

void time_input(int& hour,int& minute);

void time_output(int& hour,int& minte,char& noon);

void time_change(int& hour,int& minte,char& noon);

int main()

{

int hour,minute;

char p;

char noon;

do{

time_input(hour,minute);

time_change(hour,minute,noon);

time_output(hour,minute,noon);

cout<<"Enter 'r' to again. ";

cin>>p;

}while(p=='R'||p=='r');

system("pause");//某些编译器此处可以不要

return 0;

}

void time_input(int& hour,int& minute)

{

cout<<"Enter hour:";

cin>>hour;

cout<<"Enter minte:";

cin>>minute;

}

void time_output(int& hour,int& minute,char& noon)

{

cout<<"12-hours: "

<<hour

<<":"

<<minute

<<" "

<<noon

<<endl;

}

void time_change(int& hour,int& minute,char& noon)

{

if((hour>12&&hour<=24)&&(minute>=0&&minute<=60))

{

noon='P';

hour-=12;

}

else if((hour>=0&&hour<12)&&(minute>=0&&minute<=60)) {noon='A';}

else {cout<<"Time is error!n";}

}