#include <stdio.h>#include <stdlib.h>//求一个整数 1的位数int count0(int x){    int num=0;    while(x)    {        num+=x%2;        x/=2;    }    return num;}int count1(int x){    int num=0;    while(x)    {        num+=(x&0x01);        x>>=1;    }    return num;}int count2(int x){    int num=0;    while(x)    {        x &=(x-1);        num++;    }    return num;}int main(){    unsigned int x=10;    printf("%d   %d\n",x,count0(x));    printf("%d   %d\n",x,count1(x));    printf("%d   %d\n",x,count2(x));    return 0;}