安卓系统底层C语言算法之测试参数是几个long型的算法

2021-08-14 14:00:47

#include <stdio.h>
#define BITS_PER_LONG (sizeof(unsigned long) * 8)
//求一个数x是几个long的长度
#define BITS_TO_LONGS(x) (((x) + BITS_PER_LONG - 1) / BITS_PER_LONG)

int main(void)
{
int i = 40 ;
int j = 1000 ;
printf("%d\n",BITS_TO_LONGS(i));
printf("%d\n",BITS_TO_LONGS(j));
return 0 ;