C++实现获取本机机器名及外网IP代码

#include "stdafx.h"

#include <WINSOCK2.H>

#include <urlmon.h>

#pragma comment(lib, "ws2_32.lib")

#pragma comment(lib, "urlmon.lib")
#define MAX_SIZE 1024
int GetLocalIP();

int GetInternetIP();
int main(int argc, char* argv[])

{

    GetLocalIP();

    GetInternetIP();

    return 0;

}
int GetLocalIP()

{

    WSADATA wsaData;

    int err = WSAStartup(MAKEWORD(2, 0), &wsaData);

    if (err != 0)

    {

        return err;

    }
char szHostName[MAX_PATH] = {0};

    int nRetCode;

    nRetCode = gethostname(szHostName, sizeof(szHostName));
char* lpLocalIP;

    PHOSTENT hostinfo;
if (nRetCode != 0)

    {

        return WSAGetLastError();

    }
hostinfo = gethostbyname(szHostName);

    lpLocalIP = inet_ntoa(*(struct in_addr*)*hostinfo->h_addr_list);
if (szHostName != NULL)

    {

        printf("主机名: %s\n", szHostName);

        printf("本地IP: %s\n", lpLocalIP);

    }
WSACleanup();

    return 0;

}
int GetInternetIP()

{

    char buf[MAX_PATH] = {0};    //把网页中读出的数据放在此处

    char chTempIp[128] = {0};

    char chIP[64] = {0};        //最终存放IP在此
//将网页数据写入c:\i.ini文件中

    URLDownloadToFile(0, "http://iframe.ip138.com/ic.asp", "c:\\i.ini", 0, NULL);
FILE *fp = fopen("c:\\i.ini", "r");

    if (fp != NULL)

    {

        //

        fseek(fp, 0, SEEK_SET);

        fread(buf, 1, MAX_PATH, fp);

        fclose(fp);
//在buf中查找 [ 的位置, iIndex是buf中从[开始剩下的字符串，包括[这个字符串

        char* iIndex = strstr(buf, "[");

        if (iIndex)

        {

            sprintf(chTempIp, "%s", iIndex);

            int nBuflen = strlen(chTempIp);
for (int i = 0; i < nBuflen; i++)

            {

                chIP[i] = chTempIp[i+1];
//如果发现有 ] 则截断

                if (chTempIp[i] == ‘]‘)

                {

                    chIP[i-1] = ‘\0‘;

                    //printf("外网IP: %s\n", chIP);

                }

            }

        }
}
printf("外网IP: %s\n", chIP);

    remove("c:\\i.ini");
return 0;
}

.csharpcode, .csharpcode pre
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color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
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background-color: #f4f4f4;
width: 100%;
margin: 0em;
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.csharpcode .lnum { color: #606060; }

C++实现获取本机机器名及外网IP代码