1 #include "stdafx.h"
 2 #include <stdio.h>
 3 #include <string>
 4 
 5 template<typename T> class IComparable
 6 {
 7 public:
 8     virtual int Compare(T first, T second) = 0;
 9     virtual int CompareTo(T theOther) = 0;
10 };
11 
12 class Person : IComparable<Person>
13 {
14     char* m_lpszName;
15     int m_nAge;
16 public:
17     Person(const char* lpszName, int nAge)
18     {
19         this->m_lpszName = new char(strlen(lpszName));
20         strcpy(this->m_lpszName, lpszName);
21         this->m_nAge = nAge;
22     }
23 
24     ~Person()
25     {
26         delete[] this->m_lpszName;
27     }
28 
29     int Compare(Person first, Person second)
30     {
31         return first.m_nAge==second.m_nAge?0:first.m_nAge>second.m_nAge?1:-1;
32     }
33 
34     int CompareTo(Person another)
35     {
36         return this->m_nAge==another.m_nAge?0:this->m_nAge>another.m_nAge?1:-1;
37     }
38 };
39 
40 int _tmain(int argc, _TCHAR* argv[])
41 {
42     Person *tom = new Person("Tom",13);
43     Person *jason = new Person("Jason",27);
44     if(tom->CompareTo(*jason)>0) printf("Tom is older than Jason\n");
45     if(tom->CompareTo(*jason)==0) printf("Tom is the same age to Jason\n");
46     if(tom->CompareTo(*jason)<0) printf("Tom is youngger than Jason\n");
47 }