#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include <sys/socket.h>

#include <arpa/inet.h>

int main(int argc,char * argv[])

{

int serv_sock,clnt_sock;

char msg[] = "Hello SZT !~";

struct sockaddr_in serv_adr,clnt_adr;

socklen_t clnt_adr_sz;

if(argc != 2)

{

printf("运行时请输入端口号！～\n");

exit(1);

}

serv_sock = socket(PF_INET,SOCK_STREAM,0);

memset(&serv_adr,0,sizeof(serv_adr));

serv_adr.sin_family = AF_INET;

serv_adr.sin_addr.s_addr = htonl(INADDR_ANY);

serv_adr.sin_port = htons(atoi(argv[1]));

bind(serv_sock,(struct sockaddr *)&serv_adr,sizeof(serv_adr));

if(listen(serv_sock,5) != -1)

{

printf("listen();正在等待客户端连接，端口：%s\n",argv[1]);

}

clnt_adr_sz = sizeof(clnt_adr);

clnt_sock = accept(serv_sock,(struct sockaddr *)&serv_adr,&clnt_adr_sz);

if(clnt_sock != -1)

{

printf("accept();已经连接客户端\n");

}

write(clnt_sock,msg,sizeof(msg));

printf("write();已经发送数据：%s\n",msg);

close(clnt_sock);

close(serv_sock);

return 0;

}

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