将数字以二进制的形式打印出来

C语言:

// ConsoleApplication3.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include "stdio.h"
#include "limits.h"

int count_bits(unsigned x)
{
    unsigned int bits = 0;

    while (x)
    {
        if ((x & 1U))
            bits++;
    
        x >>= 1;
    }
        

    return bits;
}

int int_bits(void)
{
    return count_bits(UINT_MAX);
}


void print_bits(unsigned x)
{
    int i;
    for (i = int_bits() - 1; i >= 0; i--)
    {
        putchar(((x >> i) & 1U) ? '1' : '0');
    }
}


int main(void)
{
    unsigned a, b;
    a = 1111111;
    b = 112222;

    print_bits(a);
    putchar('\n');
    print_bits(b);

    
    scanf("%u", &a);
}

 

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication4
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("位: " + GetCount());

            int value = 8888;

            for (int i = GetCount(); i > 0; i--)
            {
                Console.Write(((value >> i) & 1) > 0 ? '1' : '0');
            }


            Console.ReadLine();

        }

        static int GetCount() 
        {
            int bits = 0;
            int max = int.MaxValue;

            while (max > 0) 
            {
                if ((max & 1) >= 1) 
                {
                    bits++;
                }

                max >>= 1;
            }

            return bits + 1;
        }
    }
}