How to resolve the algorithm Anagrams/Deranged anagrams step by step in the BASIC programming language
Published on 12 May 2024 09:40 PM
How to resolve the algorithm Anagrams/Deranged anagrams step by step in the BASIC programming language
Table of Contents
Problem Statement
Two or more words are said to be anagrams if they have the same characters, but in a different order. By analogy with derangements we define a deranged anagram as two words with the same characters, but in which the same character does not appear in the same position in both words. Use the word list at unixdict to find and display the longest deranged anagram.
Let's start with the solution:
Step by Step solution about How to resolve the algorithm Anagrams/Deranged anagrams step by step in the BASIC programming language
Source code in the basic programming language
DECLARE idx$ ASSOC STRING
FUNCTION Deranged(a$, b$)
FOR i = 1 TO LEN(a$)
IF MID$(a$, i, 1) = MID$(b$, i, 1) THEN RETURN FALSE
NEXT
RETURN TRUE
END FUNCTION
FOR w$ IN LOAD$(DIRNAME$(ME$) & "/unixdict.txt") STEP NL$
set$ = EXTRACT$(SORT$(EXPLODE$(w$, 1)), " ")
idx$(set$) = APPEND$(idx$(set$), 0, w$)
NEXT
FOR w$ IN OBTAIN$(idx$)
FOR x = 1 TO AMOUNT(idx$(w$))
FOR y = x+1 TO AMOUNT(idx$(w$))
IF Deranged(TOKEN$(idx$(w$), x), TOKEN$(idx$(w$), y)) AND LEN(TOKEN$(idx$(w$), x)) > current THEN
current = LEN(TOKEN$(idx$(w$), x))
an1$ = TOKEN$(idx$(w$), x)
an2$ = TOKEN$(idx$(w$), y)
END IF
NEXT
NEXT
NEXT
PRINT "Maximum deranged anagrams: ", an1$, " and ", an2$
PRINT NL$, "Total time: ", TIMER, " msecs.", NL$
INSTALL @lib$+"SORTLIB"
Sort% = FN_sortinit(0,0)
DIM dict$(26000), sort$(26000), indx%(26000)
REM Load the dictionary:
dict% = OPENIN("C:\unixdict.txt")
IF dict%=0 ERROR 100, "No dictionary file"
index% = 0
REPEAT
index% += 1
dict$(index%) = GET$#dict%
indx%(index%) = index%
UNTIL EOF#dict%
CLOSE #dict%
Total% = index%
TIME = 0
REM Sort the letters in each word:
FOR index% = 1 TO Total%
sort$(index%) = FNsortstring(dict$(index%))
NEXT
REM Sort the sorted words:
C% = Total%
CALL Sort%, sort$(1), indx%(1)
REM Find anagrams and deranged anagrams:
maxlen% = 0
maxidx% = 0
FOR index% = 1 TO Total%-1
IF sort$(index%) = sort$(index%+1) THEN
One$ = dict$(indx%(index%))
Two$ = dict$(indx%(index%+1))
FOR c% = 1 TO LEN(One$)
IF MID$(One$,c%,1) = MID$(Two$,c%,1) EXIT FOR
NEXT
IF c%>LEN(One$) IF c%>maxlen% maxlen% = c% : maxidx% = index%
ENDIF
NEXT
PRINT "The longest deranged anagrams are '" dict$(indx%(maxidx%));
PRINT "' and '" dict$(indx%(maxidx%+1)) "'"
PRINT "(taking " ; TIME/100 " seconds)"
END
DEF FNsortstring(A$)
LOCAL C%, a&()
C% = LEN(A$)
DIM a&(C%)
$$^a&(0) = A$
CALL Sort%, a&(0)
= $$^a&(0)
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