为什么老是报错呢？有什么问题？？？感谢回答?报错

#include <arpa/inet.h>
#include <netdb.h>
#include <netinet/in.h>    // for sockaddr_in
#include <sys/types.h>    // for socket
#include <sys/socket.h>    // for socket
#include <stdio.h>        // for printf
#include <stdlib.h>        // for exit
#include <string.h>        // for bzero

 
#define LISTEN_QUEUE 20
#define SERVICE_PORT 1234

int service_sockfd;
int ret;
int sc;
int ret_cv;
static char buf[]="";
 FILE *stream;
int main(int argc,char *argv[])

{
  struct sockaddr_in service_addr;
	service_addr.sin_family =AF_INET;
	service_addr.sin_port =htons(SERVICE_PORT);
	service_addr.sin_addr.s_addr =htonl(INADDR_ANY);
	//bzero(&(service_addr),sizeof(service_addr));
	
	service_sockfd =socket(AF_INET,SOCK_STREAM,0);
	if(-1 == service_sockfd)
	{
	 perror("sosck failed\n");
	 exit(-1);
	}

	if(bind(service_sockfd,(struct sockaddr*)&service_addr,sizeof(service_addr))==-1)
	{
	 printf("bind failed\n");
	 exit(-1);
	}
	if( -1 ==listen(service_sockfd,10))
	{
	 printf("listen: %s\n",hstrerror(h_errno));
	 exit(-1);
	}
	printf("listening...................\n");
	while(1)
{
	
	 socklen_t leng = sizeof(service_addr);
	 struct sockaddr_in client_addr;
	 /*
	 sc =accept(service_sockfd,(struct sockaddr*)&client_addr,&(leng));
	 if(-1 == sc)
	 {
	  printf("accept failed\n");
	  break;
	 }
	 else
	 {
	  printf("Service IP:%s::Service Port%d\n",inet_ntoa(client_addr.sin_addr),client_addr.sin_port);
	 }
	 */
	 sc = accept(service_sockfd,(struct sockaddr*)&client_addr,&(leng));
	 if(sc == -1)
	  {
	  printf("accept failed\n");
	  break;
	 }
	 else
	 {
	  printf("Service IP:%s::Service Port%d\n",inet_ntoa(client_addr.sin_addr),client_addr.sin_port);
	 }
	
	  printf("sc =[%d]\n",sc);
	 strcpy(buf,"hello 客户端！！");
	 if((ret =send(sc,buf,strlen(buf)+1,0))==-1)
	 {
	   perror("send failed\n");
	   
	 }	
	  printf("ret =[%d]\n",ret);
	 printf("the service sending!!!\n");
	 ret_cv =recv(sc,buf,1024,0);
	 if(-1 ==ret_cv)
	 {
	   perror("recv failed\n");
		 break;
	 }
	 printf("service ::recv: - %s\n",buf);
	/*
	if(fopen("file1","w+")==NULL)
	 {
	  printf("the file open error\n");
	 	  break;
	 }
	else
	{
		 printf("the file open successful\n");
	}
	 
	 int lengsize = 0;
	

	    printf("lengsize = %d\n",lengsize);
	  
	      if(recv(sc,buf,1024,0)<0)
	      {
			    printf("Send File is Failed\n");
			    break;
	      }
	   printf("Service recv:: %s\n",buf);
	    
      
	  //}
 
   if(fclose(stream))
   {
   printf("The file 'data' was not closed! \n");
   exit(1);  
	 } 
	 */
	 close(sc);     
} 
	close(service_sockfd);
	return 0;
	
}