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

int main()
{
    int sock = 0;
    struct sockaddr_in addr = {0};
    int len = 0;
    char buf[128] = {0};
    char input[32] = {0};
    int r = 0;
    int i = 0;

    sock = socket(PF_INET, SOCK_STREAM, 0);

    if( sock == -1 ) {
        printf("socket error\n");
        return -1;
    }

    // 这是客户端的代码，配置想要连接的服务器的IP地址和端口号
    addr.sin_family = AF_INET;
    addr.sin_addr.s_addr = inet_addr("192.168.0.100");
    addr.sin_port = htons(8888);

    if( connect(sock, (struct sockaddr*)&addr, sizeof(addr)) == -1 ) {
        printf("connect error\n");
        return -1;
    }

    printf("connect success\n");

    while (1) {
        printf("Input: ");

        scanf("%s", input);  // scanf接收字符串时会存储字符串结束符 \0

        len = send(sock, input, strlen(input) + 1, 0);

        r = recv(sock, buf, sizeof(buf), 0);
        // printf("recv r = %d\n", r);
        if(r > 0) {
            printf("Receive: %s\n", buf);
        } else {
            break;  // 当客户端输入quit时，服务器断开连接，recv返回值为0
        }
    }

    close(sock);

    return 0;
}