io.f

C  Author:   Mitch Richling<http://www.mitchr.me/>
C  IP:       Copyright 1993 by Mitch Richling.  All rights reserved.
C  Key word: i/o screen stdin stdout FORTRAN 77
C  Notes:    Illustrates screen/keyboard I/O in Fortran 77
C            
        program io

       integer iarray(3)
       real    val1, val2, val3

C      write (*,*) with no arguments prints a blank line
       write (*,*)

C      The (*,*) sends to STDOUT.
       write (*,*) 'Enter two numbers'
       read  (*,*) val1, val2
       write (*,*) 'The numbers: ', val1, val2

C      Simple form of write (*,*) is print *.  Note that this
C      function is deprecated.
       print *, 'input another number'

C      Simple form of read.  Note that this function is deprecated.
       read *, val3
       print *, 'The last number: ', val3 

C      You can read and write arrays too:
       write (*,*) 'Enter three values (for array)'
       read  (*,*) iarray
       write (*,*) 'The array', iarray

       end