类的写法（一）

#include<iostream>
using namespace std;
class Yearcat{
public:
void setTime(int newY=0,int newM=0,int newD=0);
void showTime();
private:
int Year,Month,Day;
};
void Yearcat::setTime(int newY,int newM,int newD){
Year=newY;
Month=newM;
Day=newD;
}
inline void Yearcat::showTime(){
cout<<Year<<":"<<Month<<":"<<Day<<endl;
}
int main(){
Yearcat myyear;
int a,b,c;
cout<<"First time set and output:\n"<<"请输入： a,b,c"<<endl;
cin>>a>>b>>c;
myyear.setTime(a,b,c);
myyear.showTime();
return 0;
}