2009: 第一个带类的C++程序

解题思路:

注意事项:

参考代码:

#include<iostream>
using namespace std;
class Data
{
public:
    void Set(string str)
    {
        int pos1=0,pos2=0;
        pos1=str.find("-");
        pos2=str.rfind("-");
        for(int i=0;i<pos1;i++){
            this->year*=10;
            this->year+=(str[i]-'0');
        }
        for(int i=pos1+1;i<pos2;i++){
            this->month*=10;
            this->month+=(str[i]-'0');
        }
        for(int i=pos2+1;i<str.length();i++){
            this->day*=10;
            this->day+=(str[i]-'0');
        }
    }
    void print()
    {
        cout<<year<<":"<<month<<":"<<day<<endl;
    }
private:
    int year=0,month=0,day=0;
};
int main()
{
    string str;
    cin>>str;
    Data D;
    D.Set(str);
    D.print();
    return 0;
}