explicit specialization 显式指定

//explicit specialization 显式指定
#include "stdafx.h"
#include <iostream>
#include <string>
using namespace std;
 
struct msg
{
    string title;
    string content;
};
 
//非模板函数
void Broadcast(const string& msg);
 
//模板函数
template <typename T>
void Broadcast(const T& msg);
 
//explicit specialization 显式指定
template<> void Broadcast<msg>(const msg& msg);    
 
int main(void)
{
    string simpleMsg = "You just receive one message";
    int msgNum = ;
    msg msg;
    msg.title = "Attention";
    msg.content = "Perimeter has been breached, evacuate to section 7.";
 
    Broadcast(simpleMsg);
    Broadcast(msgNum);
    Broadcast(msg);
 
    cin.get();
    return ;
}
 
void Broadcast(const string& msg)
{
    cout << "Notice: " << msg << endl;
}
 
template <typename T>
void Broadcast(const T& msg)
{
    cout << "No: " << msg << endl;
}
 
template<> void Broadcast<msg>(const msg& msg)
{
    cout << endl;
    cout << "************************************" << endl;
    cout << "Title: " << msg.title << endl;
    cout << "Content: " << msg.content << endl;
    cout << "************************************" << endl;
}