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 %cn",char_recv);    
             
    close(sockfd);    
    exit(0);    
}

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