c++ - 无限循环问题

Question

我有一个问题。此代码未给出应有的结果。它应该超出控制台的数量，并且出于某种原因，它在执行此操作时忽略了 if 语句。另外，在这个程序中，InputNum 应该保持 long 数据类型。

#include <iostream>
#include <fstream>

using namespace std;

/*
Function Name: CalculateBinary
CalculateBinary takes a number from the main function and finds its binary form.
*/

void CalculateBinary(long InputNum)
{   
    //Takes InputNum and divides it down to "1" or "0" so that it can be put in binary form.
    if ( InputNum != 1 && InputNum != 0)
        CalculateBinary(InputNum/2);

    // If the number has no remainder it outputs a "0". Otherwise it outputs a "1". 
    if (InputNum % 2 == 0)
        cout << "0";
    else
        cout << "1";
}


void main()
{
    // Where the current number will be stored
    long InputNum = 3000000000;

    //Opens the text file and inputs first number into InputNum. 
//  ifstream fin("binin.txt");
//  fin >> InputNum;

    // While Input number is not 0 the loop will continue to evaluate, getting a new number each time.
    while (InputNum >= 0)
    {
        if(InputNum > 1000000000)
            cout << "Number too large for this program ....";
        else
            CalculateBinary(InputNum);

        cout << endl;
        //fin >> InputNum;      
    }
}

Answer 1

CalculateBinary(InputNum) 不会修改 InputNum 的值，因此它的值将始终相同 (300000000) 并且 while 循环永远不会结束。