方法一:
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
#include<math.h>
int count_one_bits(unsigned int value)
{
int count = 0;
int i = 0;
for (i = 0; i < 32; ++i)
{
if (value &(1 << i))
++count;
}
return count;
}
int main()
{
int ret = count_one_bits(10);
printf("这个二进制数中1的个数为:%d\n", ret);
system("pause");
return 0;
}
方法一中当输入的二进制为负数时,程序编译会出错 ,可优化为方法二。
方法二:
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
#include<math.h>
int count_one_bits(unsigned int value)
{
int count = 0;
int i = 0;
for (i = 0; i < 32; ++i)
{
if (value &(1 << i))
++count;
}
return count;
}
int main()
{
int ret = count_one_bits(10);
printf("这个二进制数中1的个数为:%d\n", ret);
system("pause");
return 0;
}