HOW TO USE NUMERICAL ALGORITHMS GROUP (NAG) FORTRAN COMPILER

1. The first step is to open Command Prompt (cmd). Command Prompt is found under accessories on the start menu.
2. Navigate to the directory where the files are stored using the change directory command (’cd’). Consider if the files were in the directory called C:/Users/Ben/Documents/3_Summer_2012/Fortran_tests. The command to go to this folder would be:

   cd users/ben/documents/3_Summer_2012/fortran_tests
   

3. Next compile the code by typing nagfor  < filename.f95 >  −  < option > 
   
4. Press Enter
5. To run the program type the output file’s name in the Command Prompt. This name will depend on the options selected. If no name was entered the output name will be arbitrary, determined by the compiler program(The default is ’a.exe’). Otherwise enter the name used previously.
6. 

Options

• all perform all checks except for -C=undefined
  array Check Array bounds
  bits Check bit intrinsic arguments
  calls check procedure references
  dangling check for dangling pointers
  do check DO loops for zero step values
  none do no checking: this is the default
  present check OPTIONAL references
  pointer Check POINTER references
  recursion Check for invalid recursion
  undefined Check for undefined variables