help:我的程序怎么不能编译

board · 发表于 2003-9-12 10:47:33

小弟刚开始学习socket编程
照书抄了一段程序，可是在编译的时候却提示出错
[board@board board]$ gcc -o test socket/test1.c
socket/test1.c: In function `main':
socket/test1.c:18: parse error before '{' token
socket/test1.c: At top level:
socket/test1.c:23: parse error before '.' token
socket/test1.c:26: parse error before '&' token
socket/test1.c:31: parse error before numeric constant
socket/test1.c:31: conflicting types for `exit'
/usr/include/stdlib.h:610: previous declaration of `exit'
socket/test1.c:31: warning: data definition has no type or storage class
socket/test1.c:36: parse error before numeric constant
socket/test1.c:36: warning: data definition has no type or storage class
socket/test1.c:46: parse error before string constant
socket/test1.c:51: warning: parameter names (without types) in function declaration
socket/test1.c:51: warning: data definition has no type or storage class
socket/test1.c:52: parse error before numeric constant
socket/test1.c:52: warning: data definition has no type or storage class
socket/test1.c:54: warning: parameter names (without types) in function declaration
socket/test1.c:54: warning: data definition has no type or storage class
socket/test1.c:55: parse error before "while"

程序代码如下:
[code:1]#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <netinet/in.h>
#define MYPORT 3388 /*定义用户连接端口*/
#define BACKLOG 10 /*多少等待连接控制*/
main ()
{
int sockfd,new_fd; /*用sockefd进行监听，new_fd建立新的连接*/
struct sockaddr_in my_addr; /*我的地址信息*/
struct sockaddr_in their_addr; /*连接用户的地址信息*/
int sin_size;

if ((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1{
perror("socket");
exit(1);
}

my_addr.sin_family=AF_INET;/*本机字节顺序*/
my_addr.sin_port=htons(MYPORT);/*将本机端口信息转换成网络顺序*/
my_addr.sin_addr.s_addr=INADDR_ANY; /*自动实用本机的ip地址*/
bzero(&(my_addr.sin_zero)),;/*将其他的结构置为空*/

if (bind(sockfd,(struct sockaddr *)&my_addr,sizeof(struct
sockaddr))==-1) {
perror(bind);
exit(1);
}

if (listen(sockfd,BACKLOG)==-1){
perror("listen");
exit(1);
}

while(1){/*主函数accept()循环*/
sin_size=sizeof(struct sockaddr_in);
if ((new_fd=accept(sockfd,(struct sockaddr *)&their_addr,\
&sin)size))==-1{
perror("accept");
continue;
}
printf("server:got connection from %s\n",\
inet_ntoa(their_addr.sin_addr));
if(!fork()){/*这是一个子进程*/
if(send(new_fd,"hello,world!\n",14,0)==-1)
perror("send");
close(new_fd);
exit(0);
}
close(new_fd); /*父进程关闭新的连接*/
while(waitpid(-1,NULL,WNOHANG) > 0); /*清除子进程*/
}
}[/code:1]

EdwardRF · 发表于 2003-9-12 10:51:12

int main()

board · 发表于 2003-9-12 11:38:55

[board@board board]$ gcc -o test socket/test1.c
socket/test1.c: In function `main':
socket/test1.c:18: parse error before '{' token
socket/test1.c: At top level:
socket/test1.c:23: parse error before '.' token
socket/test1.c:26: parse error before '&' token
socket/test1.c:31: parse error before numeric constant
socket/test1.c:31: conflicting types for `exit'
/usr/include/stdlib.h:610: previous declaration of `exit'
socket/test1.c:31: warning: data definition has no type or storage class
socket/test1.c:36: parse error before numeric constant
socket/test1.c:36: warning: data definition has no type or storage class
socket/test1.c:46: parse error before string constant
socket/test1.c:51: warning: parameter names (without types) in function declaration
socket/test1.c:51: warning: data definition has no type or storage class
socket/test1.c:52: parse error before numeric constant
socket/test1.c:52: warning: data definition has no type or storage class
socket/test1.c:54: warning: parameter names (without types) in function declaration
socket/test1.c:54: warning: data definition has no type or storage class
socket/test1.c:55: parse error before "while"

老样子哦

mozilla · 发表于 2003-9-12 11:54:21

if ((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1{
      perror("socket");
      exit(1);

if (((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1){
      perror("socket");
      exit(1);

board · 发表于 2003-9-12 12:00:19

还是不行阿。。。。

mozilla · 发表于 2003-9-12 12:05:08

[code:1]
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <netinet/in.h>
#define MYPORT 3388 /*定义用户连接端口*/
#define BACKLOG 10 /*多少等待连接控制*/
main ()
{
      int sockfd,new_fd;
      struct sockaddr_in my_addr;
      struct sockaddr_in their_addr;
      int sin_size;
      if ((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1)
      {
            perror("socket");
            exit(1);
      }

      my_addr.sin_family=AF_INET;/*本机字节顺序*/
      my_addr.sin_port=htons(MYPORT);/*将本机端口信息转换成网络顺序*/
      my_addr.sin_addr.s_addr=INADDR_ANY; /*自动实用本机的ip地址*/
      bzero(&(my_addr.sin_zero));/*将其他的结构置为空*/

      if (bind(sockfd,(struct sockaddr *)&my_addr,sizeof(struct
                                    sockaddr))==-1) {
            perror(bind);
            exit(1);
      }

      if (listen(sockfd,BACKLOG)==-1){
            perror("listen");
            exit(1);
      }

      while(1){/*主函数accept()循环*/
            sin_size=sizeof(struct sockaddr_in);
            if (((new_fd=accept(sockfd,(struct sockaddr *)&their_addr,\
                                                      &sin_size)))==-1){
                     perror("accept");
                     continue;
            }
            printf("server:got connection from %s\n",\
                              inet_ntoa(their_addr.sin_addr));
            if(!fork()){/*这是一个子进程*/
                     if(send(new_fd,"hello,world!\n",14,0)==-1)
                              perror("send");
                     close(new_fd);
                     exit(0);
            }
            close(new_fd); /*父进程关闭新的连接*/
            while(waitpid(-1,NULL,WNOHANG) > 0); /*清除子进程*/
      }
}

[/code:1]

rocklgk · 发表于 2003-9-12 14:47:22

[code:1]
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#define MYPORT 3388 /*定义用户连接端口*/
#define BACKLOG 10 /*多少等待连接控制*/
int main ()
{
      int sockfd,new_fd;
      struct sockaddr_in my_addr;
      struct sockaddr_in their_addr;
      int sin_size;
      if ((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1)
      {
            perror("socket");
            exit(1);
      }

      my_addr.sin_family=AF_INET;/*本机字节顺序*/
      my_addr.sin_port=htons(MYPORT);/*将本机端口信息转换成网络顺序*/
      my_addr.sin_addr.s_addr=INADDR_ANY; /*自动实用本机的ip地址*/
      bzero(&(my_addr.sin_zero), sizeof(my_addr));/*将其他的结构置为空*/

      if (bind(sockfd,(struct sockaddr *)&my_addr,sizeof(struct
                                    sockaddr))==-1) {
            perror("bind");
            exit(1);
      }

      if (listen(sockfd,BACKLOG)==-1){
            perror("listen");
            exit(1);
      }

      while(1){/*主函数accept()循环*/
   sin_size = sizeof(struct sockaddr);
  if ((new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size))==-1)
            {
                     perror("accept");
                     continue;
            }
            printf("server:got connection from %s\n",inet_ntoa(their_addr.sin_addr));
            if(!fork()){/*这是一个子进程*/
                     if(send(new_fd,"hello,world!\n",14,0)==-1)
                              perror("send");
                     close(new_fd);
                     exit(0);
            }
            close(new_fd); /*父进程关闭新的连接*/
            while(waitpid(-1,NULL,WNOHANG) > 0); /*清除子进程*/
      }
return 0;
}

[/code:1]

你的程序改成这样就行了。

rocklgk · 发表于 2003-9-12 14:54:15

具体修改项：
1. 在引用的头文件里加入#include <unistd.h>
2.bzero函数有两个参数,第二个是定义修改成0的位数,所以加入sizeof(my_addr)
3.修改perro(bind)为perro("bind")
4.accept函数那的括号有问题,你注意一下比配,应该是多了一对括号.
5.accept函数最后一个参数应该为&sin_size.
我记得刚才编译的时候就这些错误,

现在很多例程都有错误,一定要自己编译发现错误才能学到真东西.

祝你socket旅程愉快!

board · 发表于 2003-9-13 15:55:28

赫赫，已经搞定了，少了个 ) 多谢大家~

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