Thread: Sequential Filenames?

Hi all,

i am in desperate need of help... i've got a simple maths problem that requires performing a series of calculations on a series of single integers...

i have the program to do the calulations, but i want to fully automate it, and would like to output the results to a file, whos name is the same as the number which the operation is carried out on... EG. if i was doing the calculation on the number 335 i would like the file to be called 335
fopen will only allow 'const char' to be used an an input? how do use variable filenames???

please please help
thanks in advance

Si-man

Have you considered writing a little function that converts your integer into a string?

'const char' is a string. the file io routines wants a string passed to it.

Originally posted by quzah
Just use sprintf, like already suggested:

Code:

while( !done ) 
{
    sprinf( buf, "%d.dat", number );
    fp = fopen( buf, "wb" );
    ...do stuff...
    fclosef( fp );
}

Quzah.

Argghhhhaaaa

C hates me

i havn't got the first clue how to define the variables for this routine... and i keep getting errors about how i cannot use one type of variable in the fopen statement.. but when i change the variable types one of the other statements doesnt work..

can you tell me what each of the variables in the above statement should be ????

thanks

si