简单的C/S通信，但是结果不等于预期

Question

server端代码：
#include
#include
#include
#include
#include
#include
#include

int main()
{

int fd,sd;
struct sockaddr_in mysock;
fd=socket(AF_INET,SOCK_STREAM,0);

memset(&mysock,0,sizeof(mysock));
mysock.sin_family=AF_INET;
mysock.sin_port=htonl(1025);
mysock.sin_addr.s_addr=htonl(INADDR_ANY);

bind(fd,(struct sockaddr*)&mysock,sizeof(mysock));
listen(fd,13);

while(1)
{
    puts("circle");
    char buf[1024];
    int n;
    sd=accept(fd,(struct sockaddr*)NULL,NULL);
    n=recv(sd,buf,sizeof(buf),0);
    //write(1,buf,n);
    buf[n]='\0';
    printf("%s\n",buf);
    close(sd);
}
close(fd);
return 0;

}

 client端代码：

#include
#include
#include
#include
#include
#include
#include

int main(int argc,char **argv)
{

int cd;
char buf[]="hello c tongxin!";
struct sockaddr_in clisock;

cd=socket(AF_INET,SOCK_STREAM,0);

memset(&clisock,0,sizeof(clisock)); 
clisock.sin_family=AF_INET;
clisock.sin_port=htonl(1025);

// clisock.sin_addr.s_addr=argv[1];
inet_pton(AF_INET,argv[1],&clisock.sin_addr);

connect(cd,(struct sockaddr *)&clisock,sizeof(clisock));

send(cd,buf,strlen(buf),0);
close(cd);
return 0;

}

客户端连接发送一个字符串，但是服务端没反应，代码哪里有问题？

Answer 1

客户端连接上到服务端的对应ip 端口了没。先看连接建立了没