c++ ip地址相关

#include <stdio.h>
#include <string.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <pthread.h>

#define NUM 20

void *working(void *args) {

    in_addr* inaddr = (in_addr* )args;
    //inaddr.s_addr=*(int *)args;

    for(int i=0; i<100000; i++) {
        //char buf[16];
        //const char* ptr;

        //ptr = inet_ntop(AF_INET, inaddr, buf, sizeof(buf));
        //printf("%s\t%u\n", ptr,(unsigned)pthread_self());

        char *ptr = inet_ntoa(*inaddr);
        printf("%s\t%u\n", ptr,(unsigned)pthread_self());
    }
    return NULL;
}


int main(int argc,char**argv){
    int i;

    int nip = 16777343;

    pthread_t child[NUM];
    for(i=0; i<NUM; i++) {
        int ip = nip + i;

        in_addr inaddr;
        inaddr.s_addr=ip;
        
        //char buf[16];
        //const char* ptr;

        //ptr = inet_ntop(AF_INET, &inaddr, buf, sizeof(buf));
        //printf("%s\t%u\n", ptr,(unsigned)pthread_self());

        //char buf[20];
        //char *ptr = inet_ntoa(inaddr);
        //printf("%s\t%u\n", ptr,(unsigned)pthread_self());

        //pthread_create(&child[i], NULL, working, &ip);

        pthread_create(&child[i], NULL, working, &inaddr);
    }
    
    for(i=0; i<NUM; i++) {
        pthread_join(child[i], NULL);
    }

}