TCP/IP详解卷2源代码怎么实现?

Question

下面程序是第一章的习题,向一个服务器发送消息获取时间.在linux用codeblocks运行出错.而且卷2里面有大量源代码,不知道从何学起,怎么实现?
#include
#include
#include
#include
#include
#include
#include

#define BUFFERSIZE 150
int main()
{
struct sockaddr_in serv;
char buff[BUFFERSIZE];
int sockfd, n;
if ((sockfd = socket(PF_INET, SOCK_DGRAM, 0)) < 0)
printf("socket error");

bzero((char *) &serv, sizeof(serv));
serv.sin_family = AF_INET;
serv.sin_addr.s_addr = inet_addr("140.252.1.32");
serv.sin_port = htons(13);

if (sendto(sockfd, buff, BUFFERSIZE, 0,
           (struct sockaddr *) &serv, sizeof(serv)) != BUFFERSIZE)
    printf("sendto error");

if ((n = recvfrom(sockfd, buff, BUFFERSIZE, 0,
                  (struct sockaddr *) NULL, (int *) NULL)) < 2)
     printf("recvfrom error");
buff[n - 2] = 0;
printf("%s\n", buff);

exit(0);

}

Answer 1

看下是否缺少头文件，一般有makefile自己找找。