函数模板

函数模板也能够不一样实参形参类型来实例化：

#include <iostream>
#include <string>

using namespace std;

template <typename T>
void print()
{
    if (sizeof(T) == sizeof(char))
        cout << "the function is speciallize as char" << endl;
    else if (sizeof(T) == sizeof(int))
        cout << "the function is speciallize as int" << endl;
}

int main(void)
{
    print<int>();//经过和类模板类似的形式实例化
    print<char>(); 
    return 0;
}