Question

C++语言的问题

谢谢了，

Answer 1

#include<iostream>

using namespace std;

class Date {
private:
    char year[5];
    char month[3];
    char day[3];
public:
    Date(char _year[],char _month[],char _day[])
    {
       
        strcpy(year,_year);
        strcpy(month,_month);
        strcpy(day,_day);
    }
    void display()
    {
             
        switch(strlen(year))
        {
            case 0:
                 cout << "0000";            break;
            case 1:
                 cout << "000" << year;  break;
            case 2:
                 cout << "00"  << year;  break;
            case 3:
                 cout << "0"   << year;  break;
            case 4:
                 cout          << year;  break; 
        }
        cout << "/";
        switch(strlen(month))
        {
            case 0:
                 cout << "00";                break;
            case 1:
                 cout << "0" << month;   break;
            case 2:
                 cout        << month;    break;
        }
        cout << "/";
        switch(strlen(day)) {
            case 0:
                 cout << "00";                break;
            case 1:
                 cout << "0" << day;     break;
            case 2:
                 cout        << day;     break;
        }
        
    }
};

class Time {
private:
    char hour[3];
    char  minute[3]; 
public:
    Time(char _hour[], char _minute[])
    {
        strcpy(hour,_hour);
        strcpy(minute,_minute);          
    }
    
    void display()
    {
        switch(strlen(hour))
        {
            case 0:
                 cout << "00";                break;
            case 1:
                 cout << "0" << hour;    break;
            case 2: 
                 cout        << hour;     break;
        }
        cout << ":";
        switch(strlen(minute)) {
            case 0:
                 cout << "00";                break;
            case 1:
                 cout << "0" << minute;  break;
            case 2:
                 cout        << minute;  break;
        }    
    }
};

int main(int argc,char* argv[])
{
    char year[5];
    char month[3];
    char day[3];
    char hour[3];
    char  minute[3];
    while(cin >> year >> month >> day >> hour >> minute)
    {
         if(strcmp(year,"0")==0 
         && strcmp(month,"0")==0 
         && strcmp(day,"0")==0 
         && strcmp(hour,"0")==0
         && strcmp(minute,"0")==0
         )break;
         Date a = Date(year,month,day);
         Time t = Time(hour,minute);
         a.display();
         cout << " ";
         t.display();
         cout << endl;
    }
    system("pause");
    return 0;
}

追问

如果用setfill('0')好像会少很多代码