version 1.112, 2006/07/18 15:26:23
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version 1.114, 2006/07/27 22:56:37
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Line 206 sub implicit_multiplication {
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Line 206 sub implicit_multiplication {
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# 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 -> a*b;3 b -> 3*b;3 4 -> 3*4 |
$expression=~s/\s+/\*/gs; |
$expression=~s/(\w)\s+(\w)/$1\*$2/gs; |
# 3a -> 3*a; 3( -> 3*(; 3A -> 3*a |
# 3a -> 3*a; 3( -> 3*(; 3A -> 3*a |
$expression=~s/(\d)([a-zA-Z\(])/$1\*$2/gs; |
$expression=~s/(\d)([a-zA-Z\(])/$1\*$2/gs; |
# a3 -> a*3; )3 -> )*3 |
# a3 -> a*3; |
$expression=~s/([a-zA-Z])(\d)/$1\*$2/gs; |
$expression=~s/([a-zA-Z])(\d)/$1\*$2/gs; |
# )a -> )*a |
# )a -> )*a; )3 -> )*3 |
$expression=~s/\)(\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; |