代码;
server.c:
#include
#include
#include
#include
#include
#include
int main()
{
int server_sockfd, client_sockfd;
int server_len, client_len;
struct sockaddr_in server_address;
struct sockaddr_in client_address;
server_sockfd = socket(AF_INET, SOCK_STREAM, 0);
server_address.sin_family = AF_INET;
server_address.sin_addr.s_addr = inet_addr("127.0.0.1");
server_address.sin_port = 9734;
server_len = sizeof(server_address);
bind(server_sockfd, (struct sockaddr *) &server_address, server_len);
listen(server_sockfd, 5);
while (1) {
char ch;
printf("服务器等待消息\n");
client_len = sizeof(client_address);
client_sockfd = accept(server_sockfd,
(struct sockaddr *) &client_address,
(socklen_t *__restrict) &client_len);
read(client_sockfd, &ch, 1);
ch++;
write(client_sockfd, &ch, 1);
close(client_sockfd);
}
}
client.c
#include
#include
#include
#include
#include
#include
int main() {
int sockfd;
int len;
struct sockaddr_in address;
int result;
char ch = 'A';
sockfd = socket(AF_INET,SOCK_STREAM, 0);
address.sin_family = AF_INET;
address.sin_addr.s_addr = inet_addr("127.0.0.1");
address.sin_port = 9734;
len = sizeof(address);
result = connect(sockfd, (struct sockaddr *) &address, len);
if (result == -1) {
perror("连接失败");
return 1;
}
write(sockfd, &ch, 1);
read(sockfd, &ch, 1);
printf("来自服务器的消息是%c\n", ch);
close(sockfd);
return 0;
}
运行:
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