C套接字编程 - printf不会在屏幕上打印任何内容

Question

我是unix socket编程的新手.我没有找到一本舒适的书或教程,所以我真的很挣扎.

这是程序代码:

#include<stdio.h>
#include<sys/socket.h>
#include<sys/types.h>
#include <netinet/in.h>

int main(){

    printf("one");
    int socketHandle, newSocketHandle, portno;
    struct sockaddr_in serverAddress, clientAddress;


    printf("two");


    portno = 5001;
    bzero((char *) &serverAddress, sizeof(serverAddress));
    serverAddress.sin_family = AF_INET;
    serverAddress.sin_addr.s_addr = INADDR_ANY;
    serverAddress.sin_port = htons(portno);

    printf("three");

    //creating the socket
    socketHandle = socket(AF_INET, SOCK_STREAM, 0);
    if(socketHandle < 0){
        perror("ERROR : Socket not created.");
        return -1;
    }
    printf("Socket created.");





    //binding the socket
    if(bind(socketHandle, (struct sockaddr *) &serverAddress, sizeof(serverAddress)) < 0){
        perror("ERROR : Socket not binded.");
        return -1;
    }
    printf("Socket binded.");

    //make the socket listen
    listen(socketHandle, 5);

    int len = sizeof(clientAddress);
    //accept the connection requests
    newSocketHandle = accept(socketHandle, (struct sockaddr *) &clientAddress, &len);
    if(newSocketHandle < 0){
        perror("ERROR : Connection not accepted.");
    }

    printf("Connection accepted.");
    return 0;
}

(我试图打印one,two以及three用于调试)

但是,即使printf("one")在第一行中也行不通.光标只是一直闪烁(表示程序仍在执行中).我甚至无法弄清楚上述程序出了什么问题.使用该bzero()功能也会发出警告说

warning: incompatible implicit declaration of built-in function ‘bzero’ [enabled by default]

我发现socket编程很难,因为不同的网站显示不同的代码.另外,请建议任何关于C/C++套接字编程的好教程.

Answer 1

确保在调试消息中打印换行符,以便立即显示.

例 printf("one\n");

如果你真的不想换行,你可以改用输出fflush(stdout);.