Talking about C++ (2) Namespace

We can modify the program in (1) as follows:

Make the following changes to main.cpp:

# include<iostream>
# include"people.h"
using namespace xiaoguai; //使用命名空间xiaoguai
int main(int argc, const char * argv[])
{
	people *p = new people();
	p->sayhello();             //通过指针p访问到成员方法
	delete p;   //释放内存空间
	system("pause");
	return 0;
}

Make the following modifications to people.h and people.cpp respectively:

#pragma once
namespace xiaoguai{  //将类放到命名空间xiaoguai内
class people
{
public:
	void sayhello();
};
}

# include<iostream>
#include "people.h"
using namespace std;
namespace xiaoguai{  // 放到命名空间小乖内
void people::sayhello()
{
	cout << "Hello World\n";
}
}

After completion, save and run O(∩_∩)O, and then succeed to get the same result as in (1).