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.

Basically, you just have to convert your int to a string.

I suggest you look into the function in stdio called
sprintf

I believe MSVC++ 6 allows itoa() unlike UNIX to convert your int to a string. Confused, what platform are you working on ?

Just use sprintf, like already suggested:

Code:

---

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

---

Quzah.

Quote:

---

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