用C語言寫一個函數返回參數二進制中1的個數

#include <stdio.h>
int count_one_bits(unsigned int value)
{
int count =0;
while(value)
{
if(value%2==1)
{
count++;
}
value=value/2;
}
return count;
}
int main()
{
unsigned int num=0;
int ret=0;
scanf("%d",&num);
ret=count_one_bits(num);
printf("count=%d\n",ret);
return 0; 
}