C + + builder build to open 64 files at the same time, under the project of simple code is as follows:


The FILE * p [64];
Int I;
AnsiString STR.
for(i=0; i<64; I++)
{
STR=IntToStr (I) + ". TXT ".
If ((p [I]=fopen (STR) c_str (), "wt"))
==NULL)
{
ShowMessage (STR);
return ;
}
}
STR=STR + "complete";
ShowMessage (STR);


Found only 47 file,

Excuse me each warrior, where this is to limit the?

Can remove this restriction?

thank you

CodePudding user response:

Can be dealt with by close the file,

CodePudding user response:

C + + Builder with fopen open at the same time the maximum number of files have, defined in _nfile. H, the default is 50
# define _NFILE_ 50
In addition to each process of the default stdin, stdout, stderror three file handle, only 47 file open,

CodePudding user response:

My head in a program to add the following code:
#include<_nfile. H>
# define _NFILE_ 70

The results appear the following error:
W8017 Redefinition of '_NFILE_ "is not idetical

I do not know where is wrong, how can you change "at the same time open the file number of ceiling"?

CodePudding user response:

I do not know where is wrong, how can you change "at the same time open the file number of ceiling"?

CodePudding user response:

Try this undef, the word count

CodePudding user response:

Fopen is the foundation of C functions, in addition to ccrun said that limit, estimates there are considerations such as allocating memory,
You can switch to FileCreate, FileOpen this way, no problem for certain,