c语言字符串查找指定ip,C语言获得电脑的IP地址的小例子

#include

#include

#pragma comment(lib, "WS2_32.lib")

int main()

{

char host_name[256]; // define host name (for example:xxx-PC)

int WSA_return, i;

WSADATA WSAData;

HOSTENT *host_entry; // record host information

WORD  wVersionRequested;

wVersionRequested = MAKEWORD(2, 0);

WSA_return = WSAStartup(wVersionRequested, &WSAData); // initialize Winsock service and then call other socket or dll file

if (WSA_return == 0) // initialize success

{

gethostname(host_name, sizeof(host_name));

host_entry = gethostbyname(host_name);

for(i = 0; host_entry != NULL && host_entry->h_addr_list[i] != NULL; ++i)

{

// define pszAddr to record IP

// inet_ntoa: Convert an IP into an Internet standard dotted format string

const char *pszAddr = inet_ntoa (*(struct in_addr *)host_entry->h_addr_list[i]);

printf("[IP]\t%s\n[Name]\t%s\n\n", pszAddr, host_name);

}

}

else

{

printf("ERROR\n");

}

/* WSACleanup() finish use Winsock 2 DLL (Ws2_32.dll). Head:Winsock2.h. reference #pragma comment(lib, "ws2_32.lib") */

WSACleanup();

return 0;

}