刚在学unix网络编程 connect能够连接 read老是返回-1是什么鬼。
客户端代码：
#include <stdio.h>
#include <io.h>
#include <winsock2.h>

int main()
{
    int sockfd, n, ret;

    WORD ver;
WSADATA data;
ver = MAKEWORD( 2, 2 );
ret = WSAStartup( ver, &data );

    char recvline[100], addr[] = "127.0.0.1";

    struct sockaddr_in servaddr;

    if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
    {
        printf("sock open error!\n");
        return 0;
    }

    memset(&servaddr, 0, sizeof(servaddr));

    servaddr.sin_family = AF_INET;
    servaddr.sin_port = htons(1111);

    servaddr.sin_addr.S_un.S_addr = inet_addr(addr);

    if((ret = connect(sockfd, (struct sockaddr*)&servaddr, sizeof(servaddr))) < 0)
    {

        ret = WSAGetLastError();
        printf("connect error!");
        return 0;
    }

    while((n = read(sockfd, recvline, 100)) > 0)
    {
        recvline[n] = 0;
        printf(recvline);
    }

    if(n < 0)
    perror("read");

    getchar();

    return 0;
}
服务端:
#include <stdio.h>
#include <io.h>
#include <winsock2.h>
#include <time.h>

int main()
{
    int listfd, ret, connfd;
    time_t ticks;
    WORD ver;
WSADATA data;
ver = MAKEWORD( 2, 2 );
ret = WSAStartup( ver, &data );

    char sendline[100];

    struct sockaddr_in listaddr;

if((listfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
    printf("socket open error!");
    return 0;
}

memset(&listaddr, 0, sizeof(listaddr));

listaddr.sin_family = AF_INET;
listaddr.sin_port = htons(1111);
listaddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY);

bind(listfd, (struct sockaddr *)&listaddr, sizeof(listaddr));

listen(listfd, 5);

for( ; ; )
{
    connfd = accept(listfd, (struct sockaddr *)NULL, NULL);

    ticks = time(NULL);

    snprintf(sendline, sizeof(sendline), "%.24s\r\n", ctime(&ticks));

    write(connfd, sendline, strlen(sendline));

    close(connfd);
}

return 0;
}

首先，对于每个函数的调用，你得观察其返回值，以确定其有没有调用成功。尤其是你服务器端的bind函数
其次，winsock的发送/接收/关闭是send/recv/closesocket吧，不是write/read/close吧

非常感谢 看来要把书上的函数换一下才行了。