ntohl,htonl函数

#include <stdio.h>
#include <errno.h>
#include <signal.h>
#include <strings.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <ctype.h>
#include <setjmp.h>
#include <sys/time.h>
#include <stdarg.h>

int main(int argc, char * * argv)
{
    int a, b, c;
    printf("sizeof(char)=[%d], sizeof(int)=[%d]\n", sizeof(char), sizeof(int));
    sprintf(&a, "0124");
    printf("a=[%d]\n", a);
    b = ntohl(a);
    printf("b=[%d]\n", b);
    c = atoi(&a);
    printf("c=[%d]\n", c);

    int d = 123;
    int len;
    len=htonl(d);
    printf("d=[%d]\n", d);
    printf("len=[%d]\n", len);

    /*read，write 互相约定好，一起转才可以*/
    int length;
    length=ntohl(len);
    printf("length=[%d]\n", length);

    printf("============================\n");
    int host = 1;
    host=htonl(host);
    printf("host=[%d]\n", host);
    printf("============================\n");

    return 0;
}