为什么源文件的名称影响编译? [英] Why does the name of a source file affect compilation?
问题描述
当我在C ++中编写一个名为lotto.cpp的小程序时,我遇到了一些很奇怪的事情。一切都很好,直到我写我的程序的写入文件。当我编译时,它显示我以下错误:
I came across something really weird when I wrote a little lotto program in C++ called "lotto.cpp". Everything was fine until I wrote the write-to-file for my program. When I compiled, it showed me the following error:
ld: can't open output file for writing: lotto, errno=21 for architecture x86_64
collect2: ld returned 1 exit status
巧合,我的程序的名称为1.cpp,并突然它编译没有问题。它也工作时,我改名为test.cpp。
By coincidence, I changed the name of my program to "1.cpp", and all of a sudden it compiled without problems. It also worked when I changed the name to "test.cpp".
我真的很好奇为什么会发生这种情况。任何想法?
I am really curious as to why this happened. Any Ideas?
这发生在MacBook Pro上。
This happened on a MacBook Pro.
如果您也想要代码,请告诉我们!
If you want the code as well, just let me know!
我知道一些人要求的代码。这是:
I know some people asked for the code. Here it is:
#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 << "\n\nDo 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 << "\n\nnormal Lotto:\n";
(ans == VIKING) ? out << "\nViking Lotto:\n" : out << "\n\nnormal 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 << "\n\n";
cout <<"Another lottery ticket (Y/N) ";
cin >> ans2;
}while(ans2 == 'j' || ans2 == 'J');
cout << "\n\nLOTTO NUMBERS WAS WRITTEN TO FILE...\n\n";
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;
}
推荐答案
错误编号21 X 10.7.2)是 EISDIR:是目录
。
Error number 21 (on MacOS X 10.7.2) is EISDIR: Is a directory
.
名称 lotto
似乎是一个目录,而不是一个文件。
The name lotto
seems to be a directory, not a file.
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