For lack of the input data this program expects, it is impossible to say what this program is trying to achieve.
It runs, but it seems not to output anything meaningful, so it is very well possible it's logic is wrong.
A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James
My blog: Imperial Deltronics