calculate greatest common denominator of two numbers

read contents of circle: "Point(int x, int y), int rad"

find smallest and largest value in msi

find smallest and largest value in msld

read contents of line: "Point(int x1, int y1), Point(int x2, int y2)"

read contents of rectangle: "Point(int x, int y), int w, int h"

returns a pointer to the next Shape extracted from is, null if no successful

calculate sum of vector elements

compute sum of vector elements

put input into right vector, count rejected entries

check for Wumpus, pits and bats in neighbouring rooms

write help to output

ignore Tokens up to specific kind

ignore Tokens up to specific kind

ignore Tokens up to specific kind

return the new value as the result

pass a pointer (dereference it and increment the result)