[guest06012]

Code

double dbldata[];

This, you need to initialize the array to some value..... if you do not want to, try using dynamic memory. Also why not google your compiler's errors?
read about arrays and dynamic memory
cplusplus.com/ doc/tutorial/arrays/
cplusplus.com/ doc/tutorial/dynamic/
^ cannot post links yet (delete space between the backslash and "doc")

[guest06012]

^ Nice, but you should probably just tell him what he did wrong and leave it at that, this is most likely homework so i do not suggest you do it for him.