C++实现进程间通信

利用TCP/IP/来实现，不过目前只能实现一对一你一句我一句的聊天。

有两个.c文件，ser.c和cli.c

Redhat系统，需要的头文件如下：

#include<stdio.h>
#include<unistd.h>
#include<stdlib.h>
#include<string.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>

服务器

int main()
{
//1
int sockSer = socket(AF_INET, SOCK_STREAM, 0);
if(sockSer == -1)
{
perror(“socket.”);
exit(1);
}

//2
struct sockaddr_in addeSer;
addrSer.sin_family = AF_INET;
addrSer.sin_port = htons(6666);
addrSer.sin_addr_.s_addr = INADDR_ANY;

socklen_t addrlen = sizeof(struct sockaddr);
int ret = bind(sockSer, (struct sockaddr*)&addrSer, addrlen);
if(ret == -1)
{
	perror("bind.");
	exit(1);
}

//3
int backlog = 5;
ret = listen(sockSer, backlog);
if(ret == -1)
{
	perror("listen.");
	exit(1);
}

//4
int sockConn;
struct sockaddr_in addrCli;
sockConn = accept(sockSer, (struct sockaddr*)&addrCli, &addrlen);
if(sockConn == -1)
{
	printf("Server Accept Client Connnect Fail.\n");
}
else 
{
	printf("Server Accept Client Connect Success.\n");
}

char sendbuf[256];
char recvbuf{256};
while(1)
{
	printf("Ser:>");
	scanf("%s",sendbuf);
	send(sockConn, sendbuf, strlen(sendbuf)+1, 0);

	recv(sockConn, recvbuf, 256, 0);
	printf("Cli:>%s\n",recvbuf);
}
close(sockSer);

return 0;

}
用户

int main()
{
int sockCli = socket(AF_INET, SOCK_STREAM, 0);
if(sockCli == -1)
{
perror(“socket.”);
exit(1);
}

struct sockaddr_in addeSer;
addrSer.sin_family = AF_INET;
addrSer.sin_port = htons(6666);
addrSer.sin_addr_.s_addr = inet_addr("127.0.0.1");
socklen_t addrlen = sizeof(struct sockaddr);
int ret = connect(sockCli, (struct sockaddr*)&addrSer, addrlen);
if(ret == -1)
	printf("Client Connect Server Fail.\n");
else
	printf("Client Connect Server Success.\n");

char sendbuf[256];
char recvbuf{256};
while(1)
{
	recv(sockCli, recvbuf, 256, 0);
	printf("Ser:>%s\n",recvbuf);

	printf("Cli:>");
	scanf("%s",sendbuf);
	send(sockCli, sendbuf, strlen(sendbuf)+1, 0);
}
close(sockCli);

return 0;

}
另外利用管道、信号、共享内存、消息队列也可以实现进程间通讯，不过上述代码可以在不同的机器之间实现通讯。