i have problem with error in command window, it says undefined function 'carea' for the input arg types 'double'

https://drive.google.com/folderview?id=0BxxU8O_otDLuNGRDQVlTWFcyU1E&usp=sharing

take a look at this files, and please help me solve it

all the filename and function are the same, yet I dunno where is the error

Answer 1

[Walter Roberson]

When I download those and invoke

contohenam

then it finds the routines without difficulty. All of them should be in the current directory at the time you execute.

[fatin shuhada]

means u can run the program w/out any error? thanks for your respond. :)

[Walter Roberson]

Correct. I downloaded the program and I run it without problem by giving the command

contohenam