函数模板

 1 #include <iostream>
 2 using namespace std;
 3 
 4 void myswap01(int& x,int& y)
 5 {
 6     int temp=0;
 7     temp=x;
 8     x=y;
 9     y=temp;
10 }
11 
12 void myswap02(char& x,char& y)
13 {
14     char temp=0;
15     temp=x;
16     x=y;
17     y=temp;
18 }
19 
20 template <typename T>
21 void myswap(T& x,T& y)
22 {
23     T temp;
24     temp=x;
25     x=y;
26     y=temp;
27 }
28 
29 int main()
30 {
31     int a=10,b=20;
32     char p=‘P‘,q=‘Q‘;
33 
34     myswap01(a,b);
35     cout<<"a="<<a<<" "<<"b="<<b<<endl;
36 
37     myswap02(p,q);
38     cout<<"p="<<p<<" "<<"q="<<q<<endl;
39 
40     //显示调用
41     cout<<endl<<endl;
42     myswap<int>(a,b);
43     cout<<"a="<<a<<" "<<"b="<<b<<endl;
44 
45     myswap<char>(p,q);
46     cout<<"p="<<p<<" "<<"q="<<q<<endl;
47 
48     //自动类型推导，一般很少用
49     cout<<endl<<endl;
50     myswap(a,b);
51     cout<<"a="<<a<<" "<<"b="<<b<<endl;
52 
53     myswap(p,q);
54     cout<<"p="<<p<<" "<<"q="<<q<<endl;
55 
56 
57     return 0;
58 }