使用select函数提高服务器的处理能力——客户端代码

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/stat.h>

#include <fcntl.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>
#include <unistd.h>
#include <errno.h>
#include <sys/select.h>
#define DEFAULT_PORT 6666

int main(int argc, char* argv[])
{
    int connfd=0;
    int cLen=0;
    struct sockaddr_in client;
    if(argc<2)
    {
        printf("Usage: clientent [server IP address]\n");
        return -1;
    }
    client.sin_family=AF_INET;
    client.sin_port=htons(DEFAULT_PORT);
    client.sin_addr.s_addr=inet_addr(argv[1]);
    connfd=socket(AF_INET,SOCK_STREAM,0);
    if(connfd<0)
    {
        perror("create socket failed");
        return -1;
    }
    if(connect(connfd, (struct sockaddr*)&client, sizeof(client))<0)
    {
        perror("connect failed");
        return -1;
    }

    char buffer[1024];
    bzero(buffer, sizeof(buffer));
    recv(connfd, buffer, 1024, 0);
    printf("recv: %s\n",buffer);
    bzero(buffer, sizeof(buffer));
    strcpy(buffer, "this is client!\n");
    send(connfd, buffer, 1024, 0);
    while(1)
    {
        bzero(buffer, sizeof(buffer));
        scanf("%s",buffer);
        int p=strlen(buffer);
        buffer[p]='\0';
        send(connfd, buffer, 1024, 0);
        printf("i have send buffer!!!\n");
    }
    close(connfd);
    return 0;
}