中国DOS联盟

I did an experiment using the following code and found that DOS under WinXP command line also has a limit on the number of simultaneously opened files! My XP can only open 15 files simultaneously.
If under pure DOS or Win9X, you can solve it by modifying the FILES=?? in the c:\Config.Sys file. How to solve it under XP!

void MyDebug()
{
int i;
char buf;

FILE* psFile;
for (i = 0; i < 20; i++)
{
sprintf(buf, "Abcde-%02d.Txt", i + 1);
psFile = fopen(buf, "a+b");

}

for (i = 0; i < 20; i++)
{
printf("\nFile%02d::%08lX", i + 1, (unsigned long)psFile);
if (NULL != psFile)
{
::fclose( psFile );
psFile= NULL;
}
}

getch();

return;
}

Execution result is:
File01::75BF71CE
File02::75BF71E2
File03::75BF1F6
.....
File14::75BF72D2
File15::75BF72E6
File16::00000000
File17::00000000
File18::00000000
File19::00000000
File20::00000000

Last edited by firstsail on 2010-1-28 at 19:13 ]

Try modifying windows\system32\config.nt?

Modify my c:\WindowXP\System32\Config.NT file

After I changed Files=40 to Files=60 in the file and restarted the computer, executing the same code still gave the original result, which did not achieve the expected purpose!

Execution result is:
File01::75BF71CE
File02::75BF71E2
File03::75BF1F6
.....
File14::75BF72D2
File15::75BF72E6
File16::00000000
File17::00000000
File18::00000000
File19::00000000
File20::00000000

Why is the post display abnormal?

It is clearly like this:

for (i = 0; i < 20; i++)
{
printf("\nFile%02d::%08lX", i + 1, (unsigned long)psFile);
if (NULL != psFile)
{
::fclose( psFile);
psFile= NULL;
}
}

How did it display as:

for (i = 0; i < 20; i++)
{
printf("\nFile%02d::%08lX", i + 1, (unsigned long)psFile);
if (NULL != psFile)
{
::fclose( psFile);
psFile= NULL;
}
}


Copying "the first-floor post" into the "Notepad" program, the situation seen is normal, but the situation seen with the eyes is the second situation. Could it be that there is a virus???

Last edited by firstsail on 2010-1-28 at 19:18 ]

It clearly is like this
for (i = 0; i < 20; i++)
{
printf("\nFile%02d::%08lX", i + 1, (unsigned long)psFile);
if (NULL != psFile)
{
::fclose( psFile);
psFile= NULL;
}
}

How it shows as
for (i = 0; i < 20; i++)
{
printf("\nFile%02d::%08lX", i + 1, (unsigned long)psFile);
if (NULL != psFile)
{
::fclose( psFile);
psFile= NULL;
}
}


Found that after modifying the post, there will be such a phenomenon, strange!

It is estimated that it is caused by the conflict between the variable in your code and the code in Discuz! code, resulting in font deformation.
Solution
Method 1: Check "Disable Discuz! Code" when posting
Method 2: Add

Discuz! code at both ends of the code you post

Are you under CMD or COMMAND? It seems that config.nt and autoexec.nt are only effective for COMMAND.

I'm under my XP, there's only CMD, no COMMAND

Could it be that you're also using that modified version of Windows? A lot of things have been streamlined?

The WinXP I installed was installed using a genuine software that I bought for 300 yuan!

Haha! If that's the case, then you can go to the person who sold you the software to settle the account: Why doesn't my Windows XP have COMMAND? What kind of XP did you sell me!