Function: issquare
Section: number_theoretical
C-Name: gissquarerem
Prototype: GD&
Help: issquare(x,{&n}): true(1) if x is a square, false(0) if not. If n is
 given puts the exact square root there if it was computed
Description: 
 (int):bool	Z_issquare($1)
 (mp):int	gissquare($1)
 (gen):gen	gissquare($1)
 (int, &int):bool	Z_issquarerem($1, &$2)
 (gen, &gen):gen	gissquarerem($1, &$2)

