text: /*
   * Copyright (c) 2018, kingchin1218@126.com 
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without modification,
   * are permitted provided that the following conditions are met:
   *
   * * Redistributions of source code must retain the above copyright notice, this
   *   list of conditions and the following disclaimer.
   *
   * * Redistributions in binary form must reproduce the above copyright notice, this
   *   list of conditions and the following disclaimer in the documentation and/or
   *   other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
   * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
   * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  
  #include <stdio.h>
  #include <netinet/in.h>
  #include <sys/socket.h>
  #include <sys/types.h>
  #include <unistd.h>
  #include <string.h>
  #include <arpa/inet.h>
  
  #define PORT 9999
  
  void str_cli(int fd) {
  	char buf[128];
  	while (1) {
  		memset(buf, 0, 100);
  		printf("send to:");
  		//scanf("%s", buf);
  		fgets(buf, 100, stdin);
  		//printf("sending...\n");
  		size_t len = strlen(buf);
  		buf[len] = '\n';
  		write(fd, buf, len + 1);
  
  		int n = read(fd, buf, 100);
  		//printf("cli>>>rece from server %d bytes\n", n);
  		printf("from server: %s\n", buf);
  	}
  }
  
  
  
  int main () {
  	int sockfd;
  	struct sockaddr_in servaddr;
  	
  	sockfd = socket(AF_INET, SOCK_STREAM, 0);
  	bzero(&servaddr, sizeof(servaddr));
  	
  	servaddr.sin_family = AF_INET;
  	servaddr.sin_port = htons(PORT);
  	
  	inet_pton(AF_INET, "127.0.0.1", &servaddr.sin_addr);
  
  	connect(sockfd, (struct sockaddr*) &servaddr, sizeof(servaddr));
  	str_cli(sockfd);
  
  	return 0;
  }
  
  
  
  