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Exercise 1
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*** Source files:

The files are available at http://www.daimi.au.dk/~ups/PE/exercise1

power.c: The generic power function in C.  Takes no arguments.

imageprocessor.c: Main program part for image filtering for ppm
                  images.  Needs '-lppm' when compiling.  Takes
                  #iterations, infile, outfile, and either 'round5' or
                  an integer as command-line arguments.

convolutionfilter.c: Generic convolution filter with two kinds of
                     sample masks for blurring.

*** What to do:

(1) Implement program generators for the power function, parameterized
    with the operator and the exponent, in M4, in C using printf, and
    using C++ templates.  If you did not follow Olivier's PE course
    this previous quarter, do it using quasiquotation as well.
    Compare the efficiency of the resulting programs to the generic
    program (for an appropriate number of iterations).  For "extra
    credit" do the russian peasant version as well.

(2) Implement a program generator for the convolution filter, using
    the technique of your choice from the previous assignment (note:
    printf is easiest, C++ templates is hardest).  Depending on the
    specific mask, various amounts of optimization are possible for
    the generated code (for those having followed Olivier's course: do
    not necessarily feel constrained by what a PE would be able to
    do).  Compare the efficiency of the resulting program to the
    original program.