C语言网络编程遇到问题了，求高手帮助！
小弟是初学者，深知让前辈帮忙看代码是一件极其愚蠢，极其没良心的事，不过这小段代码小弟是反复琢磨了几万遍有了，还是找不出哪里出问题了阿。麻烦高手帮忙看看，代码也不长，是简单的客户端请求连接服务端，然后发送了 一个字符串过去，可是老连接失败啊，拜托拜托。。。。
服务端：

C/C++ code

#include <stdlib.h>#include <stdio.h>#include <errno.h>#include <string.h>#include <netdb.h>#include <sys/types.h>#include <netinet/in.h>#include <sys/socket.h>#define portnumber 3333void main(){    struct sockaddr_in serve_sock ;    struct sockaddr_in client_sock;    int sockfd;    int new_sockfd;    char *s;    if((sockfd = socket(AF_INET,SOCK_STREAM,0)) == -1)    {        printf("creat sock fail !\n");        exit(1);    }    /*填写 sockaddr_in 的成员数据*/    bzero(&serve_sock,sizeof(struct sockaddr_in));   /*清 0 */    serve_sock.sin_family = AF_INET;                 /*设置协议为 IPV4*/    serve_sock.sin_port = htons(portnumber);         /*设置端口号为 3333*/    serve_sock.sin_addr.s_addr = htonl(INADDR_ANY);  /*设置IP为任意IP地址*/    if(bind(sockfd,(struct sockaddr *)(&serve_sock),sizeof(struct sockaddr)) == -1)  /*绑定*/    {        printf("bind sock fail!\n");        exit(1);    }    if(listen(sockfd,5) == -1) /*设置最大连接数为5*/    {        printf("listen sock fail!\n");        exit(1);    }    while(1)    {        if((new_sockfd = accept(sockfd,(struct sockaddr *)(&client_sock),sizeof(struct sockaddr_in))) == -1)  /*堵塞，等待连接请求*/        {            printf("accept fail!\n");            exit(1);        }        printf("connect from the client process successfully!\n");        read(new_sockfd,s,1024);  /*读取客户端程序发送来的字符串*/        printf("read the string %s\n",s);   /*将字符串打印出来*/        close(sockfd);            /*关闭本次连接*/    }}

客户端：

C/C++ code

#include <stdlib.h>#include <stdio.h>#include <errno.h>#include <string.h>#include <netdb.h>#include <sys/types.h>#include <netinet/in.h>#include <sys/socket.h>#define portnumber 3333void  main(int argc,char *argv[]){    struct sockaddr_in client_sock;    struct hostent *host;    int fd;    char *s;    if((host=gethostbyname(argv[1]))==NULL)  /*通过命令行参数传进来的ip地址获取 hostent 变量*/     {          fprintf(stderr,"Gethostname error\n");          exit(1);     }    if(fd = socket(AF_INET,SOCK_STREAM,0) == -1)    {        printf("creat socket fail!\n");        exit(1);    }    bzero(&client_sock,sizeof(client_sock));    /*填写各所需参数*/    client_sock.sin_family = AF_INET;    client_sock.sin_port = htons(portnumber);    client_sock.sin_addr=*((struct in_addr *)host->h_addr);  /*设置远程 IP ，通过 hostent 变量获得 h->addr*/    if(connect(fd,(struct sockaddr *)(&client_sock),sizeof(struct sockaddr)) == -1) /*连接请求*/    {        printf("connet fail!\n");        /***执行失败了，我执行的时候打印出 connet fail!,我不解为什么连接失败啊，反复查了好几遍了还是没有看出来***/        exit(1);    }    printf("connet from the serve successfully!\n");    printf("please inpu :");    scanf("%s",s);    close(fd);}

[解决办法]
客户端
if(fd = socket(AF_INET,SOCK_STREAM,0) == -1)

漏括号了。。
if((fd = socket(AF_INET,SOCK_STREAM,0)) == -1)