C++回调函数

 1 #include <iostream>
 2 #include <string>
 3 using namespace std;
 4 
 5 
 6 void SelectSort( int *pArray, int size ){
 7     if( size <= 1 )
 8     {
 9         return;
10     }
11 
12     for( int i=0; i<size-1; ++i )
13     {
14         int min = i;
15         for( int j=i+1; j<size; ++j )
16         {
17             if( pArray[j] < pArray[min] )
18             {
19                 min = j;
20             }
21         }
22         if( min != i )
23         {
24             int temp = pArray[i];
25             pArray[i] = pArray[min];
26             pArray[min] = temp;
27         }
28     }
29 
30 }
31 
32 template< typename T >
33 void Display( T *pArray, int size )
34 {
35     for( int i=0; i<size; ++i )
36     {
37         cout.width(4);
38         cout.setf( ios::left );
39         cout << pArray[i];
40     }
41     cout << endl;
42 }
43 
44 
45 void Display1( const string &str )
46 {
47     cout << str << " is very high" << endl; 
48 }
49 
50 void Display2( const string &str )
51 {
52     cout << str << " is very rich" << endl; 
53 }
54 
55 void Display3( const string &str )
56 {
57     cout << str << " is very handsome" << endl; 
58 }
59 
60 void Show( string str, void (*dis)(const string&) )
61 {
62     dis( str );
63 }
64 
65 void ShowStrArray( string *str, int size, void (*dis)(const string&) )
66 {
67     if( size <= 0 )
68     {
69         return;
70     }
71 
72     for( int i=0; i<size; ++i )
73     {
74         dis( str[i] );
75     }
76 }
77 
78 int main()
79 {
80     //cout << "Hello" << endl;
81 
82     //int pNum[] = { 2, 1, 5, 3, 4 };
83     //SelectSort( pNum, 5 );
84     //Display( pNum, 5 );
85 
86     //Show("Green",Display1);
87     //Show("Kitty",Display2);
88     //Show("Lisa",Display3);
89 
90     string pStr[] = { "Green", "Kitty", "Lisa" };
91     ShowStrArray( pStr, 3, Display1 );
92 
93 
94 
95 
96     ShowStrArray( pStr, 3, Display2 );
97     ShowStrArray( pStr, 3, Display3 );
98     return 0;
99 }
运行结果：