A question about different fortran compiler

[User &]

Hi!I need your help!

My English is very poor, and it is not my mother language.

Could you tell me why I can not use the code to product
random number with "gfortran compiler"? Please.

But I can use the code to product random numbers with 
"pgf90(Portland Group Fortran) compiler"!

The code is given by appended document.

Why I can not use the code to product
random number with "gfortran compiler"? 

Please tell me the reason.

                                Chia-Wei Chang
                    I come form Kaohsiung, Taiwan.
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