小编Ami*_*Ali的帖子

当我编译它时我写了一个udp广播的代码然后错误是inet_addr未在此范围内声明睡眠未在此范围内声明关闭未在此范围内声明请指导我我是编程新手

sender.c:

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


#define PORT 2080
// #define SRC_ADDR "172.16.1.120"
#define DEST_ADDR "255.255.255.255"

int main(int argc, char *argv[])
{
        int sockfd;
        int broadcast=1;
        struct sockaddr_in sendaddr;
        struct sockaddr_in recvaddr;
        int numbytes;

        if((sockfd = socket(PF_INET,SOCK_DGRAM,0)) == -1)
        {
                perror("sockfd");
                exit(1);
        }

       if((setsockopt(sockfd,SOL_SOCKET,SO_BROADCAST,
                                &broadcast,sizeof broadcast)) == -1)
        {
                perror("setsockopt - SO_SOCKET ");
                exit(1);
        }

        sendaddr.sin_family = AF_INET;
        sendaddr.sin_port = htons(PORT);
        sendaddr.sin_addr.s_addr = INADDR_ANY;
        memset(sendaddr.sin_zero,'\0',sizeof sendaddr.sin_zero);

        if(bind(sockfd, (struct sockaddr*) &sendaddr, sizeof sendaddr) …