如何比较两个二进制数的位组？

Question

the coding question is

Enter non-negative 32-bit (unsigned int) and non-negative 8-bit number (unsigned int) in decimal form. Determine how many times does the 8-bit number repeats in the first 32-bit number.

I'm programming in C language and I'm having hard time understanding how to do it. So any help is welcomed. Thanks

Answer 1

int howMany(unsigned num, unsigned char byte)
{
    int result = 0;
    for(int sft = 0; sft <= (sizeof(unsigned) - 1) * CHAR_BIT; sft++, num >>= 1)
        if((num & UCHAR_MAX) == byte) result++;
    return result;
}