CLASSWORK 1                                 8/31/2006       
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1. The wordlength is 32 bits on your classroom PCs. The integer standard
   is integer*4 (1 Word = 4 Bytes, 1B=8b). Write a short Fortran program 
   to find the largest integer imax. Write out all digits of imax and
   give a shorter representation.

  
   imax =


   Calculate imax-1 and imax+1 in your Fortran program and write the
   results down.


   imax-1 =



   imax+1 =



2. Find the CPU time needed for some simple applications. Express the 
   result in units of seconds and units of PC clockcycles. Assume that
   the classroom PCs run at 2GHz.

   For all measurements use the g77 compiler with and without the -O
   option. Use the code in double precision (STMC default) and single 
   precision. So you have four results to list for each question.

   2.1 One Marsaglia random number. Use 10**8 random numbers for the
       measurement.










  2.2 Simple addition a=a+one. Repeat this at least 10**9 times.










3. Give a rough estimate of the CPU time needed for a run of
   the program ran_range in ForProg/Marsaglia.