Things go wrong — compilation uncovers error in your code!

Compilation

  gcc hello.c -o hello

or

  gfortran hello.f90 -o hello

Compilation Errors:

Sometimes the source code is not right!

  prompt> gfortran hello_faulty.f90 

  In file hello_faulty.f90:4

  prit *, "Hello from gfortran!"
  1
  Error: Unclassifiable statement at (1)