loncom/homework/default_homework.lcpm - diff

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version 1.112, 2006/07/18 15:26:23	version 1.114, 2006/07/27 22:56:37
Line 206 sub implicit_multiplication {	Line 206 sub implicit_multiplication {
# 3x10^8 -> 3&8; 3*10^-8 -> 3&-8	# 3x10^8 -> 3&8; 3*10^-8 -> 3&-8
$expression=~s/(\d+)(?:x\|\)10(?:\^\|\\)([\+\-]\d+)/$1\&$$2$/gsi;	$expression=~s/(\d+)(?:x\|\)10(?:\^\|\\)([\+\-]\d+)/$1\&$$2$/gsi;
# Fill in multiplication signs	# Fill in multiplication signs
# a b -> a*b	# a b -> ab;3 b -> 3b;3 4 -> 3*4
$expression=~s/\s+/\*/gs;	$expression=~s/(\w)\s+(\w)/$1\*$2/gs;
# 3a -> 3a; 3( -> 3(; 3A -> 3*a	# 3a -> 3a; 3( -> 3(; 3A -> 3*a
$expression=~s/(\d)([a-zA-Z\(])/$1\*$2/gs;	$expression=~s/(\d)([a-zA-Z\(])/$1\*$2/gs;
# a3 -> a3; )3 -> )3	# a3 -> a*3;
$expression=~s/([a-zA-Z])(\d)/$1\*$2/gs;	$expression=~s/([a-zA-Z])(\d)/$1\*$2/gs;
# )a -> )*a	# )a -> )a; )3 -> )3
$expression=~s/\)(\w)/\)\*$1/gs;	$expression=~s/\)(\w)/\)\*$1/gs;
# 3&8 -> 3e8; 3&-4 -> 3e-4	# 3&8 -> 3e8; 3&-4 -> 3e-4
$expression=~s/(\d+)\&$([\+\-]*\d+)$/$1e$2/gs;	$expression=~s/(\d+)\&$([\+\-]*\d+)$/$1e$2/gs;