一个字符里有多少个1

#include<stdio.h>

unsigned int CheckSetBitNum(char ucNumber);

int main()
{
    char a = 'a';
    printf("%d\n",CheckSetBitNum(a));
    

    return 1;
}

unsigned int CheckSetBitNum(char ucNumber)
{
    unsigned int i;
    unsigned int Result = 0;
    
    for(i = 0;i < 8;i++)
    {
        Result += (ucNumber & 0x01);
        ucNumber = ucNumber >> 1;
    }
    return Result;
}