为什么源文件的名称会影响编译

当我用C++编写一个名为"lotto.cpp"的小lotto程序时，我遇到了一些非常奇怪的事情。在我为程序编写写入文件之前，一切都很好。当我编译时，它显示了以下错误：

ld: can't open output file for writing: lotto, errno=21 for architecture x86_64
collect2: ld returned 1 exit status

巧合的是，我把程序的名称改为"1.cpp"，突然间，它编译得毫无问题。当我将名称更改为"test.cpp"时，它也起了作用

我真的很好奇为什么会发生这种事。有什么想法吗？

这发生在MacBook Pro上。

如果你也想要代码，请告诉我！

我知道有些人要密码。这是：

#include <iostream>
#include <fstream>
using namespace std;
const int NED  = 10;            
const int VIKING =  6;
const int NORMAL =  7;
const int MAX  = 10;
void quickSort(int arr[], int left, int right);
int checkDuplicates(int arr[], int length);
int main (int argc, const char *argv[])
{
    int i, j, k, ans;
    char ans2;
    int lottoNumbers[MAX];
    ofstream out("Lotto.txt", ios::out | ios::app);
    srand((unsigned)time(NULL));    
    do
    {
        do
        {
            cout << "nnDo you want to play Viking Lotto (press 6), or normal Lotto (press 7): ";
            cin >> ans;
        }while(ans != VIKING && ans != normal);
        (ans == VIKING) ? cout << "nViking Lotto:n" : cout << "nnnormal Lotto:n";
        (ans == VIKING) ? out << "nViking Lotto:n" : out << "nnnormal Lotto:n";

        for (i = 0; i < NED; i++)       //10 rows
        {       
            for (j = 0; j < ans; j++)  //6 or 7 columns
            {
                (ans == VIKING) ? lottoNumbers[j] = (rand() % 48) + 1 : lottoNumbers[j] = (rand() % 34) + 1;
            }
            if(checkDuplicates(lottoNumbers, ans) != -1)        
            {
                for(k = 0; k < ans; k++)
                {
                    while(checkDuplicates(lottoNumbers, ans) == lottoNumbers[k])    
                    {
                        (ans == VIKING) ? lottoNumbers[k] = (rand() % 48) + 1 : lottoNumbers[k] = (rand() % 34) + 1;
                    }
                }
            }
            quickSort(lottoNumbers, 0, ans - 1);  
            cout << 'n';
            for(j = 0; j < ans; j++)
            {
                cout << lottoNumbers[j] << 't'; 
                out << lottoNumbers[j] << 't';
            }
            out << 'n';
        }   
        cout << "nn";

        cout <<"Another lottery ticket (Y/N) ";
        cin >> ans2;
    }while(ans2 == 'j' || ans2 == 'J');
    cout << "nnLOTTO NUMBERS WAS WRITTEN TO FILE...nn";
    return 0;
}
void quickSort(int arr[], int left, int right) 
{
    int i = left, j = right;
    int tmp;
    int mid = arr[(left + right) / 2];
    while (i <= j) 
    {
        while (arr[i] < mid)    i++;
        while (arr[j] > mid)    j--;
        if (i <= j) 
        {
            tmp = arr[i];
            arr[i] = arr[j];
            arr[j] = tmp;
            i++;
            j--;
        }
    };
    if (left < j)   quickSort(arr, left, j);
    if (i < right)  quickSort(arr, i, right);
}
int checkDuplicates(int arr[], int length)  
{                                       
    for(int i = 0; i < length; i++)
    {
        for(int j = i + 1; j < length; j++)
        {   
            if(arr[i] == arr[j])    return arr[j];
        }
    }
    return -1;  
}