函数模板

 1 #include <iostream>
 2 using namespace std;
 3 
 4 //T通用数据类型
 5 template <typename T>
 6 T MAX(T *p, const int n)
 7 {
 8     T maxdata(p[0]);
 9 
10     for (int i = 0; i < n; i++)
11     {
12         if (maxdata < p[i])
13         {
14             maxdata = p[i];
15         }
16     }
17 
18     return maxdata;
19 }
20 
21 void main()
22 {
23     int a[10] = { 1,2,3,4,5,6,7,8,9,10 };
24     double b[10] = { 1,2,3,4,5,6,7,8,9,10 };
25 
26     std::cout << MAX(a, 10) << std::endl;
27     std::cout << MAX(b, 10) << std::endl;
28 
29     system("pause");
30 }

 1 #include <iostream>
 2 using namespace std;
 3 
 4 int putnum(auto num)//error C3533: 参数不能为包含“auto”的类型
 5 {
 6 
 7 }
 8 
 9 void main()
10 {
11 
12     system("pause");
13 }

 1 #include <iostream>
 2 using namespace std;
 3 
 4 template <class T>
 5 inline T getX3(T x)
 6 {
 7     return x*x*x;
 8 }
 9 
10 void main()
11 {
12     std::cout << getX3(1 + 2) << std::endl;//27
13 
14     system("pause");
15 }