dwordtobyte.c

一些linux基本函数的测试集,给像我一样的新手看看

//运行结果:把dword 3232235521转换成了char数组{192.168.0.1}
#include "string.h"
#include "stdio.h"

typedef unsigned long DWORD;
typedef unsigned char CHAR;

void dword2byte(DWORD in,CHAR array[])
{
	int i,j;
	for(i=0,j=3;i<4,j>=0;i++,j--)
	{
		array[j]=(in>>(8*i))|(CHAR)(0);
	}
}

int main()
{
	CHAR array[4];
	DWORD ipaddr=3232235521;//16820416;
	int i;
	
	dword2byte(ipaddr,array);
	
	for(i=0;i<4;i++)
		printf("the array is:%d",array[i]);
	
	return 1;
}