C语言实现返回参数二进制中1的个数

#include<stdio.h>
int count_one_bits( int value)
{
int count = 0;
for (int i = 0; i < 32; i++)
{
if ((value >> i) & 1 == 1)
{
count++;
}
}
return count;
}
int main()
{
 printf("%d\n",count_one_bits(15));
 system(“pause”);
 return 0;
}