Letter frequency: Difference between revisions
→{{header|Quick Basic PDS 7.1/VB-DOS}}
Line 4,020:
Again eliminating all fussing with the details of converting letters into list indices.
=={{header|Quick Basic
This version
<lang VB>
' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '
' Program
' '
' This program counts how many
' have a text file specified by the user.
' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '
' OPTION EXPLICIT ' Remove comment in VB-DOS
' Register
TYPE regChar
Character AS STRING * 3
Count AS LONG
END TYPE
' Var
DIM iChar AS INTEGER
DIM iCL AS INTEGER
DIM iCountChars AS INTEGER
DIM iFile AS INTEGER
DIM i AS INTEGER
DIM
DIM iMUI AS INTEGER
DIM
DIM iLUI AS INTEGER
DIM iMaxIdx AS INTEGER
DIM iP AS INTEGER
DIM iPause AS INTEGER
DIM iPMI AS INTEGER
DIM iPrint AS INTEGER
DIM lHowMany AS LONG
DIM
DIM
DIM strFile AS STRING
DIM strTxt AS STRING
DIM strDate AS STRING
DIM strTime AS STRING
DIM strKey AS STRING
CONST LngReg = 256
CONST Letters = 1
CONST FALSE = 0
CONST TRUE = NOT FALSE
'------Main program cycle
' Initialize variables
strDate = DATE$
strTime = TIME$
iFile = FREEFILE
DO
CLS
PRINT "This program counts letters or characters in a text file."
PRINT
INPUT "File to open: ", strFile
OPEN strFile FOR BINARY AS #iFile
IF LOF(iFile) > 0 THEN
PRINT "Count: 1) Letters 2) Characters (1 or 2)";
DO
strKey = INKEY$
LOOP UNTIL strKey = "1" OR strKey = "2"
PRINT ". Option selected: "; strKey
iCL = VAL(strKey)
sTime = TIMER
iP = POS(0)
lHowMany = LOF(iFile)
strTxt = SPACE$(LngReg)
IF iCL = Letters THEN
iMaxIdx = 26
ELSE
iMaxIdx = 255
END IF
IF iMaxIdx <> iPMI THEN
iPMI = iMaxIdx
REDIM rChar(0 TO iMaxIdx) AS regChar
FOR i = 0 TO iMaxIdx
IF iCL = Letters THEN
strTxt = CHR$(i + 65)
IF i = 26 THEN strTxt = CHR$(165)
ELSE
SELECT CASE i
CASE 0: strTxt = "nul"
CASE 7: strTxt = "bel"
CASE 9: strTxt = "tab"
CASE 10: strTxt = "lf"
CASE 11: strTxt = "vt"
CASE 12: strTxt = "ff"
CASE 13: strTxt = "cr"
CASE 28: strTxt = "fs"
CASE 29: strTxt = "gs"
CASE 30: strTxt = "rs"
CASE 31: strTxt = "us"
CASE 32: strTxt = "sp"
CASE ELSE: strTxt = CHR$(i)
END SELECT
END IF
rChar(i).Character = strTxt
NEXT i
ELSE
FOR i = 0 TO iMaxIdx
rChar(i).Count = 0
NEXT i
END IF
PRINT "Looking for ";
IF iCL = Letters THEN PRINT "letters."; ELSE PRINT "characters.";
PRINT " File is"; STR$(lHowMany); " in size. Working"; : COLOR 23: PRINT "..."; : COLOR (7)
DO WHILE
strTxt = SPACE$(LOF(iFile) - LOC(iFile))
END IF
GET #iFile, , strTxt
FOR i = 1 TO LEN(strTxt)
iChar = ASC(UCASE$(MID$(strTxt, i, 1)))
SELECT CASE
CASE
CASE
CASE
CASE
CASE
rChar(iChar).Count = rChar(iChar).Count + 1
ELSEIF iChar = 100 THEN ' CHR$(165)
rChar(iMaxIdx).Count = rChar(iMaxIdx).Count + 1
END IF
ELSE
iChar = ASC(MID$(strTxt, i, 1))
rChar(iChar).Count = rChar(iChar).Count + 1
END IF
NEXT i
LOOP
CLOSE #iFile
' Show the
iMUI = 0
iLUI = 0
lTotChars = 0
iCountChars = 0
CLS
IF iCL = Letters THEN PRINT "Letters found: "; ELSE PRINT "Characters found: ";
FOR i = 0
' Most Used Character
IF lMUC < rChar(i).Count THEN
lMUC = rChar(i).Count
iMUI = i
END IF
' Print
IF
IF
strTxt = strTxt + LTRIM$(RTRIM$(rChar(i).Character))
iP = POS(0)
IF iP + LEN(strTxt) + 1 >= 80 AND iPrint THEN
PRINT ","
IF CSRLIN >= 23 AND NOT iPause THEN
iPause = TRUE
PRINT "Press a key to continue..."
DO
strKey = INKEY$
LOOP UNTIL strKey <> ""
END IF
strTxt = MID$(strTxt, 3)
END IF
PRINT strTxt;
lTotChars = lTotChars + rChar(i).Count
iCountChars = iCountChars + 1
' Least Used
IF
iLUI = i
END IF
Line 4,114 ⟶ 4,213:
NEXT i
PRINT "."
' Shows the
PRINT
PRINT "
PRINT "Looked for.......................: "; : IF iCL = Letters THEN PRINT "Letters" ELSE PRINT "Characters"
PRINT "
PRINT "
IF iCL = Letters THEN PRINT "
PRINT "Distinct characters found in file:"; iCountChars; "of"; iMaxIdx + 1
PRINT "Most used character was..........: ";
iPrint = FALSE
FOR i = 0 TO iMaxIdx
IF rChar(i).Count = lMUC THEN
IF iPrint THEN PRINT ", "; ELSE iPrint = TRUE
PRINT RTRIM$(LTRIM$(rChar(i).Character));
END IF
NEXT i
PRINT " ("; LTRIM$(STR$(rChar(iMUI).Count)); " times)"
PRINT "Least used character was.........: ";
iPrint = FALSE
FOR i = 0 TO iMaxIdx
IF rChar(i).Count = lLUC THEN
IF iPrint THEN PRINT ", "; ELSE iPrint = TRUE
PRINT RTRIM$(LTRIM$(rChar(i).Character));
END IF
NEXT i
PRINT " ("; LTRIM$(STR$(rChar(iLUI).Count)); " times)"
PRINT "Time spent in the process........:"; TIMER - sTime; "seconds"
ELSE
' File does not exist
KILL strFile
PRINT
PRINT "File does not exist."
END IF
' Again?
Line 4,149 ⟶ 4,254:
PRINT "Again? (Y/n)"
DO
LOOP UNTIL
LOOP UNTIL
CLS
PRINT "End of execution
PRINT "Start time: "; strDate; " "; strTime; ", end time: "; DATE$; " "; TIME$; "."
END
' ---End of main program cycle
</lang>
Output:
<pre>
This program counts letters or characters in a text file.
File to open: readme.txt
Count: 1) Letters 2) Characters (1 or 2). Option selected: 1
Looking for letters. File is 23769 in size. Working...
Letters found: A=1427, B=306, C=583, D=530, E=2098, F=279, G=183, H=501,
I=1177, J=15, K=34, L=741, M=379, N=1219, O=1183, P=312, Q=32, R=1105, S=1079,
T=1309, U=660, V=346, W=147, X=190, Y=242, Z=70, Ñ=5.
File analyzed....................: readme.txt
Looked for.......................: Letters
Total characters in file.........: 23769
Total characters counted.........: 16152
Characters discarded on count....: 7617
Distinct characters found in file: 27 of 27
Most used character was..........: E (2098 times)
Least used character was.........: Ñ (5 times)
Time spent in the process........: .3789063 seconds
Again? (Y/n)
</pre>
=={{header|R}}==
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