1 #include<iostream>
2 using namespace std;
3 class zhong
4 {
5 private:
6 int shi;
7 int fen;
8 int miao;
9 public:
10 zhong operator++()
11 {
12 miao++;
13 if(miao==60)
14 {
15 fen++;
16 miao=0;
17 }
18 if(fen==60)
19 {
20 shi++;
21 fen=0;
22 }
23 if(shi==24) shi=0;
24 return *this;
25 }
26 zhong operator++(int)
27 {
28 zhong a=*this;
29 ++*this;
30 return a;
31 }
32 friend istream& operator>>(istream& input,zhong& a)
33 {
34 input>>a.shi>>a.fen>>a.miao;
35 return input;
36 }
37 friend ostream& operator<<(ostream& output,zhong& a)
38 {
39 output<<a.shi<<":"<<a.fen<<":"<<a.miao;
40 return output;
41 }
42 };
43 int main()
44 {
45 zhong a;
46 cin>>a;
47 a++;
48 cout<<a;
49 }
