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client.c

#include <sys/socket.h>

#include <netinet/in.h>int main(int argc,char **argv) {  char recvbuff[100];  int sockfd;  struct sockaddr_in serveraddr; printf("start/n"); sockfd = socket(AF_INET,SOCK_STREAM,0);  printf("socket/n"); bzero(&serveraddr,sizeof(serveraddr));  serveraddr.sin_family = AF_INET; serveraddr.sin_port = htons(10000);  inet_pton(AF_INET, "10.144.15.158", &serveraddr.sin_addr);  connect(sockfd,(struct sockaddr *)&serveraddr,sizeof(serveraddr)); //if sturct is cancel,build will err printf("connect/n"); recv(sockfd,recvbuff,sizeof(recvbuff),0);  printf("%s/n",recvbuff);  close(sockfd); }

server.c

#include <sys/socket.h>#include <netinet/in.h>int main(int argc,char *argv[]) {  int ret; int listensock,connsock;     struct sockaddr_in serveraddr;  printf("start/n"); const char buff[] = "Hello! Welcome here!/r/n";   listensock = socket(AF_INET,SOCK_STREAM,0); bzero(&serveraddr,sizeof(serveraddr));  serveraddr.sin_family = AF_INET;  serveraddr.sin_addr.s_addr = htonl(INADDR_ANY);  serveraddr.sin_port = htons(10000);  int on=1; setsockopt(listensock,SOL_SOCKET,SO_REUSEADDR,&on,sizeof(on)); printf("bind/n"); ret=bind(listensock,(struct sockaddr *)&serveraddr,sizeof(struct sockaddr)); //if struct is cancel,build will err.  if(ret==-1) {   printf("bind err/n");  exit(1); } listen(listensock,1024);  connsock = accept(listensock,(struct sockaddr *)NULL, NULL);  printf("accept /n"); send(connsock,buff,sizeof(buff), 0);  ret=close(connsock);  if(ret==-1)  printf("colse err1 /n"); ret=close(listensock);  if(ret==-1)  printf("colse err2 /n");} 

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