在C语言中，Socket编程是一种通过网络进行通信的方式，它允许不同的计算机或进程之间进行数据交换，下面是一个简单的Socket编程示例，展示了如何使用C语言进行基本的Socket编程。
### 服务器端
```c
#include
#include
#include
#include
#include
#include
#define PORT 8080
int main() {
int server_fd, new_socket;
struct sockaddr_in address;
int addrlen = sizeof(address);
char buffer[1024] = {0};
char *message = "Hello from server";
// 创建socket
if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) {
perror("socket failed");
exit(EXIT_FAILURE);
}
address.sin_family = AF_INET;
address.sin_addr.s_addr = INADDR_ANY;
address.sin_port = htons(PORT);
// 绑定socket到端口8080
if (bind(server_fd, (struct sockaddr *)&address, sizeof(address)) < 0) {
perror("bind failed");
// 监听连接请求
if (listen(server_fd, 3) < 0) {
perror("listen failed");
printf("Server is listening on port %d\n", PORT);
// 接受客户端连接请求并发送消息
if ((new_socket = accept(server_fd, (struct sockaddr *)&address, (socklen_t*)&addrlen)) < 0) {
perror("accept failed");
send(new_socket, message, strlen(message), 0);
printf("Message sent\n");
// 接收客户端消息并打印出来
int valread = read(new_socket, buffer, 1024);
printf("Client message: %s\n", buffer);
close(new_socket);
close(server_fd);
return 0;
}
```
### 客户端端
#include // for read and write operations on sockets.h functions.
#include // for hostent structure and herror() function.
#include // for socklen_t type and socklen_t parameter of accept() function.
#include // for O_* constants as arguments of open() function.
#include // for iovec structure and writev() function.
#include // for inet_*() functions and inet_ntoa() function.
#include // for unix domain sockets.
#include // for ftime() function and timeb structure.
#include // for CLOCKS_PER_SEC macro and times() function.
#include // for MAXPATHLEN constant.
#include // for mode constants as arguments of open() function and st_* structure members.
#include // for waitpid() function and W_* constants returned by waitpid().
#include // for group structure and gr_*() functions and GR_* constants returned by getgrnam().
#include // for passwd structure and pw_*() functions andPW_* constants returned by getpwnam().
#include // for c_lflag field of termios structure and tcsetattr() function.
#include // for glob_*() functions and GLOB_* constants returned by
