Hi guys. I'm using fopen() in order to open a file to write some data. My problem is that i want to have a variable filename and not one with a constant name. I know that fopen() takes a const char as a filename parameter, but is there any way to do this?
Thanks
Please be a little clearer.
Do you mean you want to change the contents of the char array the holds the name and fopen to just swich files on the fly? That ain't happening. You need to call fopen for each file you want to open and read or write.
And since your using C++ you should use fstream object to read and write files.
While you're breakin' down my back n'
I been rackin' out my brain
It don't matter how we make it
'Cause it always ends the same
You can push it for more mileage
But your flaps r' wearin' thin
And I could sleep on it 'til mornin'
But this nightmare never ends
Don't forget to call my lawyers
With ridiculous demands
An you can take the pity so far
But it's more than I can stand
'Cause this couchtrip's gettin' older
Tell me how long has it been
'Cause 5 years is forever
An you haven't grown up yet
-- You Could Be Mine - Guns N' Roses
Sorry... Lets say it in code way.
I hope this to be more clear....Code:void writeFile(int i); iny main(){ float data; for(int i=0;i<100;i++){ writeFile(i); } return 0; } writeFile(int i){ //each time this function called a new file created in the disk //filename : use the parameter i to construct the file name //for example filei.txt so to have file1.txt, file2.txt ... file100.txt }
Thanks for your time.
Then you could use the string class like this.
However if you don't want to use the string class or you're not allowed to then you can do this.Code:string str; str = "file" + i + ".txt;
I hope that clears it up for you.Code:char str[16]; sprintf("file%d.txt", i);
While you're breakin' down my back n'
I been rackin' out my brain
It don't matter how we make it
'Cause it always ends the same
You can push it for more mileage
But your flaps r' wearin' thin
And I could sleep on it 'til mornin'
But this nightmare never ends
Don't forget to call my lawyers
With ridiculous demands
An you can take the pity so far
But it's more than I can stand
'Cause this couchtrip's gettin' older
Tell me how long has it been
'Cause 5 years is forever
An you haven't grown up yet
-- You Could Be Mine - Guns N' Roses
Cool!!!
Thanks a lot...
