bytetodword.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char数组{192,168,0,1}变成了dword 3232235521
#include "string.h"
#include "stdio.h"

typedef unsigned long DWORD;
typedef unsigned char CHAR;

DWORD byte2dword(CHAR array[],int arraylen)
{
	DWORD num;
	int i;
	for(i=0,num=0;i<arraylen-1;i++)
	{
		printf("array[%d]= %d\n",i,array[i]);
		
		num|=array[i];
		num=num<<8;
		printf("%d num=%u\n",i,num);
	}
	printf("array[%d]= %d\n",i,array[3]);
	num|=array[3];
	printf("%d num=%u\n",i,num);
	return num;
}

int main()
{
	CHAR a[]={192,168,0,1};
	DWORD b;
	
	b=byte2dword(a,4);
	
	printf("the dword value is:%lu",b);
	return 1;
}