C++ 获取计算机名称，获取计算机ip

#include <iostream>
#include <string>
#include <vector>
#include <atlstr.h>

#include <winsock2.h>
#pragma comment(lib,"ws2_32.lib")

using namespace std;

int main(int argc, char* argv[])
{
	CString m_IP;              //IP地址临时变量
	CString m_LocalIP;
	char PCnameBuffer[128];    //获得本地计算机名
	CString m_PCname;

	WSAData data;              //初始化:如果不初始化，以下代码将无法执行
	if (WSAStartup(MAKEWORD(1, 1), &data) != 0)
	{
		cout << "初始化错误,无法获取主机信息..." << endl;
	}
	else
	{
		if (0 == gethostname(PCnameBuffer, 128))
		{
			m_PCname = PCnameBuffer;
			struct hostent* pHost;  //获得本地IP地址
			pHost = gethostbyname(PCnameBuffer);  //pHost返回的是指向主机的列表

			for (int i = 0; pHost != NULL&&pHost->h_addr_list[i] != NULL; i++)
			{
				//得到指向ip的psz变量
				LPCSTR psz = inet_ntoa(*(struct in_addr *)pHost->h_addr_list[i]);
				m_IP += psz;
			}
			m_LocalIP = m_IP;
		}

		else
		{
			cout << "获取主机信息失败..." << endl;
		}
	}

	USES_CONVERSION;		//声明使用T2A函数
	char* ComputerName = T2A(m_PCname);	  //T2A函数，将Cstring类型转换为char*
	char* ComputerIp = T2A(m_LocalIP);
	cout << ComputerName << endl;
	return 0;
}