网络编程day2

思维导图

机械臂

#include <my_head.h>
#define SER_PORT 8888
#define SER_IP "192.168.122.123"
int main(int argc, const char *argv[])
{
	int cfd=-1;
	cfd=socket(AF_INET,SOCK_STREAM,0);
	if(cfd==-1)
	{
		perror("socket error");
		return -1;
	}
	printf("cfd=%d\n",cfd);

	//2.绑定(可选)
/*	struct socketaddr_in cin;
	cin.sin_family=  AF_INET;
	cin.sin_port=  htons(CIN_PORT);
	cin.sin_addr.s_addr=inet_addr(CIN_IP);
	if(bind(cfd,(struct sockaddr*)&cin,sizeof(cin))==-1)
	{
		perror("bind error");
		return -1;
	}
	printf("bind success\n");
*/	
	//3.1填充服务器地址消息结构体
	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链接服务器
	if(connect(cfd,(struct sockaddr*)&sin,sizeof(sin))==-1)
	{
		perror("connect error");
		return -1;
	}
	printf("connect success\n");
	char red[]={0xff,0x02,0x00,0,0xff};
	unsigned char blue[]={0xff,0x02,0x01,90,0xff};

	//4.收发数据
	while(1)
	{
		char flag;
		printf("请输入要操作0|1>>>");
		scanf(" %c",&flag);
		getchar();
		switch(flag)
		{
			case 'w':
				{
				red[3]+=5;
				if(red[3]>=90)
				{
					red[3]=90;
				}
						send(cfd,red,sizeof(red),0);		}
				break;
			case 's':
				{
				red[3]-=5;
				if(red[3]<=-90)
				{
					red[3]=-90;
				}
				send(cfd,red,sizeof(red),0);
				}
				break;
			case 'a':
				{
				blue[3]+=5;
				if(blue[3]>=180)
				{
					blue[3]=180;
				}
				send(cfd,blue,sizeof(blue),0);
				}
				break;
			case 'd':
				{
				blue[3]-=5;
				if(blue[3]<=0)
				{
					blue[3]=0;
				}
				send(cfd,blue,sizeof(blue),0);
				}
				break;
		}

	}


	//5.关闭套接字
	close(cfd);
	return 0;
}