这是我的客户端和服务器端代码。我不知道为什么我运行的客户端代码的第二次

Question

Server.c

#include <sys/socket.h> 
#include <netinet/in.h> 
#include <arpa/inet.h> 
#include <stdio.h> 
#include <stdlib.h> 
#include <unistd.h> 
#include <errno.h> 
#include <string.h> 
#include <sys/types.h> 
#include <time.h> 

int main(int argc, char *argv[]) 
{ 
int listenfd = 0, connfd = 0; 
struct sockaddr_in serv_addr; 

char sendBuff[1025]; 
time_t ticks; 

listenfd = socket(AF_INET, SOCK_STREAM, 0); 
memset(&serv_addr, '0', sizeof(serv_addr)); 
memset(sendBuff, '0', sizeof(sendBuff)); 

serv_addr.sin_family = AF_INET; 
serv_addr.sin_addr.s_addr = htonl(INADDR_ANY); 
serv_addr.sin_port = htons(5000); 

bind(listenfd, (struct sockaddr*)&serv_addr, sizeof(serv_addr)); 

listen(listenfd, 10); 

while(1) 
{ 
    connfd = accept(listenfd, (struct sockaddr*)NULL, NULL); 

    ticks = time(NULL); 
    snprintf(sendBuff, sizeof(sendBuff), "%.24s\r\n", ctime(&ticks)); 
    write(connfd, sendBuff, strlen(sendBuff)); 

    close(connfd); 
    sleep(1); 
} 

}

Client.c

#include <sys/socket.h> 
#include <sys/types.h> 
#include <netinet/in.h> 
#include <netdb.h> 
#include <stdio.h> 
#include <string.h> 
#include <stdlib.h> 
#include <unistd.h> 
#include <errno.h> 
#include <arpa/inet.h> 

int main(int argc, char *argv[]) 
{ 
int sockfd = 0, n = 0; 
char recvBuff[1024]; 
struct sockaddr_in serv_addr; 

if(argc != 2) 
{ 
    printf("\n Usage: %s <ip of server> \n",argv[0]); 
    return 1; 
} 

memset(recvBuff, '0',sizeof(recvBuff)); 
if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) 
{ 
    printf("\n Error : Could not create socket \n"); 
    return 1; 
} 

memset(&serv_addr, '0', sizeof(serv_addr)); 

serv_addr.sin_family = AF_INET; 
serv_addr.sin_port = htons(5000); 

if(inet_pton(AF_INET, argv[1], &serv_addr.sin_addr)<=0) 
{ 
    printf("\n inet_pton error occured\n"); 
    return 1; 
} 

if(connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) 
{ 
    printf("\n Error : Connect Failed \n"); 
    return 1; 
} 

while ((n = read(sockfd, recvBuff, sizeof(recvBuff)-1)) > 0) 
{ 
recvBuff[n] = 0; 
if(fputs(recvBuff, stdout) == EOF) 
    { 
    printf("\n Error : Fputs error\n"); 
    } 
} 

if(n < 0) 
{ 
printf("\n Read error \n"); 
} 

return 0; 
} 

后后收到错误 “连接失败”首先执行服务器代码，然后客户端代码为我提供日期，日期和时间。但是，当我第二次执行服务器代码然后执行客户端代码时，它会给出错误“错误：连接失败”

Answer 1

一旦完成了它，关闭“sockfd”。