/* This is a small program to manipulate contours. Currently it is possible to add (+) or substract (-) two contours. Leif Laaksonen CSC 1996 Compile: cc -O2 -o contman contman.c Usage: ./contman -iinputfile1.plt+inputfile2.plt -ooutputfile.plt or ./contman -iinputfile1.plt-inputfile2.plt -ooutputfile.plt */