c++类与对象，问题在哪啊？总是有一个错误

Question

#include <iostream>
using namespace std;
class Time
{
public:
    Time(int hour,int minute,int sec);
    int set();
    int show();
private:
int hour;
int minute;
int sec;
};
int Time::set()
{
  cin>>hour>>minute>>sec;
}
int Time::show()
{
    cout<<hour<<"h"<<minute<<"s"<<sec<<endl;
}
int main( )
{
    Time t;
    cout<<"enter the time:"<<endl;
    t.set();
    t.show();
    return 0;
}

Answer 1

构造函数你没有实现代码啊。光有一个构造函数申明