多線程編程執行個體2

//多線程連接埠掃描#include <WinSock2.h>#include <stdio.h>#include <windows.h>#include <process.h>#pragma  comment(lib,"WS2_32")char ip[20];DWORD WINAPI scan(LPVOID lpParam){int prot = *(int*)lpParam;sockaddr_in sin;sin.sin_family = AF_INET;sin.sin_addr.S_un.S_addr = inet_addr(ip);SOCKET s = ::socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);sin.sin_port = htons(prot);if (::connect(s,(sockaddr *)&sin,sizeof(sin)) == SOCKET_ERROR ){::closesocket(s);return 0;}else {printf("%4d 連接埠開啟！\n",prot);::closesocket(s);return 0;}}int main(){WSADATA wsaData;WORD sockVersion = MAKEWORD(2,0);::WSAStartup(sockVersion,&wsaData);int i;HANDLE h[1000];DWORD dwThreadId;printf("請輸入目標IP地址：");scanf("%s",ip);printf("...........掃描1~2000號連接埠（TCP）...........\n");for (i = 1;i<=1000;i++){h[i-1] = CreateThread(NULL,0,scan,(LPVOID)new int(i),0,&dwThreadId);}::WaitForMultipleObjects(1000,h,FALSE,INFINITE);for (i = 0;i<1000;i++){::CloseHandle(h[i]);}for (i = 1000;i<=2000;i++){h[i-1-1000] = ::CreateThread(NULL,0,scan,(LPVOID)new int(i),0,&dwThreadId);}::WaitForMultipleObjects(1000,h,FALSE,INFINITE);for (i = 0;i<1000;i++)   {   ::CloseHandle(h[i]);}::WSACleanup();printf(".....................掃描結束!............................\n");system("pause");return 0;}