creating multiple text files
Author
in a for loop i want to creat multiple text files but i just can figure it out i used this code but it olny creates one
char* basename = "textfile";
for(int q = 1; q < 1002;q++)
{
cout << "Creating text file" << q <<"...." <<endl;
for( int i = 0; i < 1000;i++)
{
char filname [256] = {0};
sprintf(filname,"%s_%i.txt",basename,i);
poop.open(filname);
pee.open(filname);
}
}
poop.close();
pee.close();
}
but it wont work
Move your close() functions inside your for loop.
You can't open an already-open file object.
~BenDilts( void );
You can't open an already-open file object.
~BenDilts( void );
std::string basename = "textfile";std::string extension = ".txt";std::ofstream file;for (int fileNumber = 0; fileNumber < numberOfFiles; ++fileNumber){ std::string filename = basename + '_' + boost::lexical_cast< std::string >(fileNumber) + extension; file.open(filename.c_str()); file.close();}Enigma
I'm pretty sure the only way to make that last peice of code less effecient is to perhaps throw in an infinite loop.
Because saving a few cycles there is going to be so critical when the entire function is going to be I/O limited anyway. It's simple and it's error proof. Save the optimisation for when profiler shows need.
Enigma
Enigma
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