Linux进程间通信：TCP

Client.c

#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdlib.h>
int main()
{
    int sockfd;
    int len;
    struct sockaddr_in address;
    int result;
    int i,byte;
    char char_recv,char_send;
    if((sockfd = socket(AF_INET,SOCK_STREAM,0)) == -1)
    {
        perror("socket");
        exit(EXIT_FAILURE);
    }
    address.sin_family = AF_INET;
    address.sin_addr.s_addr = inet_addr("127.0.0.1");
    address.sin_port = 8080;
    len = sizeof(address);
    if((result = connect(sockfd,(struct sockaddr *)&address,len)) == -1)
    {
        perror("connect");
        exit(EXIT_FAILURE);
    }    

    printf("please enter the context you want to send to server :");
    scanf("%c",&char_send);    

    if(byte = send(sockfd,&char_send,1,0) == -1)
    {
        perror("send");
        exit(EXIT_FAILURE);
    }
    if(byte = recv(sockfd,&char_recv,1,0) == -1)
    {
        perror("recv");
        exit(EXIT_FAILURE);
    }
    printf("receive from server %c\n",char_recv);    

    close(sockfd);
    exit(0);
}

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