把十进制转换成二进制

// 把十进制转换成二进制
//

#include <iostream>
#include<stdio.h>

using namespace std;

void to_binary(unsigned long  n);

int main()
{
    unsigned long num;
    printf((“Enter an integer(q to quit):\n”));
    while (scanf_s(“%lu”, &num)==1)
    {
        printf(“Binary equivalent: “);
        to_binary(num);
        putchar(‘\n’);
        printf(“Enter an integer(q to quit) :\n”);
    }
    printf(“Done.\n”);
  
}

void to_binary(unsigned long n) {
    int r;
    r = n % 2;
    if (n>=2)
    {
        to_binary(n / 2);
    }

    putchar(r == 0 ? ‘0’ : ‘1’);

    return;
}

原文地址：http://www.cnblogs.com/wang-xiao-shuai/p/16831910.html