c++ 函数模板 函数模板提示 尝试匹配参数列表“(int, int)”

#include "stdafx.h"
#include
using namespace std;
template
void swap(T& a,T& b)
{
T c = a ;
a = b;
b = c;
}
int main()
{
int a = 1, b = 2;
cout << "a = " << a << "，b = " << b << endl;
swap(a, b);
cout << "a = " << a << "，b = " << b << endl;

}
为什么出错？？？？？？？？

T c = a ;检查一下有没有语法错误啊

 template 
void swap(T& a,T& b)

应为：

 template <class T>
void swap(T& a,T& b)

http://blog.csdn.net/a29562268/article/details/54604572 参考这个map代码