[英]How to change place of the next bits?(use only bit operations)
for example 10'00'11'01'01 -> 01'00'11'10'10例如 10'00'11'01'01 -> 01'00'11'10'10
void main() {
unsigned int num = 78;
unsigned int num2 = change_bit(num);
printf("%d\n", num2); //141
}
I need a function like that.我需要这样的功能。
From what I see, it seems that you need a function that swaps position of every 2 bits in a number.从我看来,您似乎需要一个函数来交换数字中每 2 位的位置。 few examples:
几个例子:
for this operation, a very simple function is following:对于这个操作,一个非常简单的函数如下:
unsigned int change_bit(unsigned int num)
{
return ((num & 0xAAAAAAAA) >> 1) | ((num & 0x55555555) << 1);
}
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