网络编程day2

思维导图

大小臂

#include<myhead.h>
#define SER_PORT 8888              //服务器端口号
#define SER_IP "192.168.125.37"    //服务器ip地址
#define CLI_PORT 6666              //客户端的端口号
#define CLI_IP "192.168.125.50"    //客户端IP地址

int main(int argc, const char *argv[])
{
	//1、创建用于通信的套接字文件描述符
	int cfd = socket(AF_INET, SOCK_STREAM, 0);
	if(cfd == -1)
	{
		perror("socket error");
		return -1;
	}

	//将端口号快速重用函数
	int reuse = 1;
	if(setsockopt(cfd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) == -1)
	{
		perror("setsockopt error");
		return -1;
	}

	//2、绑定
	//2.1 填充地址信息结构体
	struct sockaddr_in cin;
	cin.sin_family = AF_INET;
	cin.sin_port = htons(CLI_PORT);
	cin.sin_addr.s_addr = inet_addr(CLI_IP);

	//2.2 绑定
	if(bind(cfd, (struct sockaddr*)&cin, sizeof(cin)) == -1)
	{
		perror("bind error");
		return -1;
	}
	//3、连接服务器
	//3.1 填充服务器地址信息结构体
	struct sockaddr_in sin;
	sin.sin_family = AF_INET;
	sin.sin_port = htons(SER_PORT);
	sin.sin_addr.s_addr = inet_addr(SER_IP);

	//3.2 连接
	if(connect(cfd, (struct sockaddr*)&sin, sizeof(sin)) == -1)
	{
		perror("connect error");
		return -1;
	}
	printf("连接成功\n");

	//4、收发数据
	//定义大臂小臂
	char flag = 0;
	char rbuf[5] = {0xff, 0x02, 0x00, 0, 0xff};
	unsigned char bbuf[5] = {0xff, 0x02, 0x01, 0, 0xff};

	while(1)
	{
		printf("请输入>>>");
		scanf("%c",&flag);
		getchar();
		switch(flag)
		{
		case 'w':
		case 'W':
			{
				rbuf[3] += 3;
				if(rbuf[3] >= 90)
				{
					rbuf[3] = 90;
				}
				send(cfd, rbuf, sizeof(rbuf), 0);
			}break;
		case 's':
		case 'S':
			{
				rbuf[3] -= 3;
				if(rbuf[3] <= -90)
				{
					rbuf[3] = -90;
				}
				send(cfd, rbuf, sizeof(rbuf), 0);
			}break;
		case 'd':
		case 'D':
			{
				bbuf[3] += 3;
				if(bbuf[3] >= 180)
				{
					bbuf[3] = 180;
				}
				send(cfd, bbuf, sizeof(bbuf), 0);
			}break;
		case 'a':
		case 'A':
			{
				bbuf[3] -= 3;
				if(bbuf[3] <= 0)
				{
					bbuf[3] = 0;
				}
				send(cfd, bbuf, sizeof(bbuf), 0);
			}break;

		}
	}

	//5、关闭套接字
	close(cfd);
	return 0;
}