convert time-24小时制转换为12小时制，允许重复计算：
//convert time#includeusing namespace std;void get_time(int& hours,int& minutes);void convert_time(int& hours,char& ampm);void show_time(int hours,int minutes,char ampm);int main(){ int hours,minutes; char ans,ampm; do { get_time(hours,minutes); convert_time(hours,ampm); show_time(hours,minutes,ampm); cout<<"Do you want again?"; cin>>ans; }while('y' == ans || 'Y' == ans); }void get_time(int& hours,int& minutes){ char b; cout<<"Enter the time like 11:11 format:\n"; cin>>hours>>b>>minutes;}void convert_time(int& hours,char& a){ if(hours < 12) a = 'A'; else if(hours >12) { hours -=12; a = 'P'; } else if(hours == 12) { a = 'P'; }}void show_time(int hours,int minutes,char ampm){ cout<<"The convert time is "< <<":"< <<" "< <<"M"<
结果：
Enter the time like 11:11 format:11:30The convert time is 11:30 AMDo you want again?YEnter the time like 11:11 format:15:30The convert time is 3:30 PMDo you want again?YEnter the time like 11:11 format:12:30The convert time is 12:30 PMDo you want again?YEnter the time like 11:11 format:0:40The convert time is 0:40 AMDo you want again?