cpc () {
  if (($# > 5)); then
    echo "Function cpc() takes at most 5 parameters."
    echo "Usage: cpc src_1 src_2 test_generator test_from test_to"
    return
  fi

  echo "Compiling default solution $1."
  echo "======================================================================"
  g++ -O2 -std=gnu++14 -Wall -Wextra -Wshadow -Wnon-virtual-dtor -pedantic "$1" -o a
  echo "======================================================================"
  echo "Default solution compiled.\n"

  if (($# >= 2)); then
    echo "Compiling alternative solution $2."
    echo "======================================================================"
    g++ -O2 -std=gnu++14 -Wall -Wextra -Wshadow -Wnon-virtual-dtor -pedantic "$2" -o b
    echo "======================================================================"
    echo "Alternative solution compiled.\n"
  fi

  if (($# >= 3)); then
    echo "Compiling test generator $3."
    echo "======================================================================"
    g++ -O2 -std=gnu++14 -Wall -Wextra -Wshadow -Wnon-virtual-dtor -pedantic "$3" -o c
    echo "======================================================================"
    echo "Test generator compiled.\n"

    for i in `seq -w $4 $5`; do
      ./c >> $i.in
    done
  fi

  echo "Checking test cases."
  echo "======================================================================"
  for i in *.in; do
    ./a < $i >> ${i%in}re

    if (($# >= 2)); then
      ./b < $i >> ${i%in}ok
    fi

    diff -u ${i%in}re ${i%in}ok
    if [ $? -ne 0 ]; then
      echo "Test ${i%.in} failed."
      # return
    else
      echo "Test ${i%.in} passed."
    fi
  done
  echo "======================================================================"

  rm *.re
  rm -f a b c
}