Calling a function

[Rh0ads]

i have a function system();, which acts as sending a command through DOS. i am trying to send the command "mkdir X" where X is the number stored in the variable T (long), how do i consolidate them? I've tried system("mkdir " t ); and other stuff but it doesn't work, any ideas?

[kedaman]

char buffer[20];
sprintf(buffer, "mkdir %d", t);
system(buffer);