Merkkijonon käsittely c++
Kale
tahdon kaivaa sieltä merkit bb jaa dd kahteen eri jonoon, mutta kuinka?
nikolas mäki
> Mulla on stringi mj="aabbccddee"
>
> tahdon kaivaa sieltä merkit bb jaa dd kahteen eri jonoon, mutta kuinka?
>
>
2) kopioi alkuperäiseen jätettävät merkit tilapäiseen merkkijonoon
3) kopioi omiin merkkijonoihinsa siirrettävät niihin
4) kopioi tilapäinen merkkijono alkuperäisen paikalle
--
Muuten olen sitä mieltä, että suomen on erottava EU:sta.
Kale
news:goug45$k1v$1...@nyytiset.pp.htv.fi...
Joo näin aattelinkin sen tehdä, mutta millä komennoilla merkkijonoa
tutkitaan?
Jari Kaija
> tutkitaan?
Sysutilsseista löytyy läjä vaikka ja mitä. Kyllä ne kääntäjän
helpeistä, jos moisessa on IDE, löytyy oikein helposti.
AnsiCompareStr
Compares strings based on the current locale with case sensitivity.
AnsiCompareText
Compares strings based on the current locale without case sensitivity.
AnsiDequotedStr
Converts a quoted string into an unquoted string
AnsiExtractQuotedStr
Converts a quoted string into an unquoted string.
AnsiLastChar
Returns a pointer to the last character in a string.
AnsiLowerCase
Returns a string that is a copy of the given string converted to lower case.
AnsiLowerCaseFileName
Converts a file name to lower case.
AnsiPos
Locates the position of a substring within an AnsiString.
AnsiQuotedStr
Returns the quoted version of an AnsiString.
AnsiSameStr
Compares AnsiStrings based on the current locale with case sensitivity.
AnsiSameText
Compares AnsiStrings based on the current locale without case sensitivity.
AnsiStrComp
Compares null-terminated character strings.
AnsiStrIComp
Compares null terminated character strings case insensitively.
AnsiStrLastChar
Returns a pointer to the last character in a null-terminated string.
AnsiStrLComp
Compares the first MaxLen bytes of two null-terminated strings,
case-sensitively.
AnsiStrLIComp
Compares two strings, case-insensitively, up to the first MaxLen bytes.
AnsiStrLower
Converts all characters in a null-terminated string to lower case.
AnsiStrPos
Returns a pointer to the first occurrence of a substring.
AnsiStrRScan
Returns a pointer to the last occurrence of a specified character in a
specified string.
AnsiStrScan
Returns a pointer to first occurrence of a character in a string.
AnsiStrUpper
Converts all characters in a null-terminated string to upper case.
AnsiUpperCase
Converts an AnsiString to upper case.
AnsiUpperCaseFileName
Converts a file name to upper case.
AppendStr
Appends a dynamically allocated string to an existing string.
Beep
Generates a message beep.
BoolToStr
Converts a Boolean value to an AnsiString.
ByteToCharIndex
Returns the position of the character that contains a specified byte in an
AnsiString.
ByteToCharLen
Returns the number of characters fully contained in the first MaxLen bytes
of an AnsiString.
ByteType
Indicates whether a byte in an AnsiString is a single byte character, the
first byte of a double byte character, or the second byte of a double byte
character.
ChangeFileExt
Changes the extension of a file name.
CharLength
Returns number of bytes used by a character.
CharToByteIndex
Returns the 1-based index of the first byte of a specified character in an
AnsiString.
CharToByteLen
Returns the length, in bytes, of the first MaxLen characters of an
AnsiString.
CompareMem
Performs a binary comparison of two memory images.
CompareStr
Compares two AnsiStrings case sensitively.
CompareText
Compares two AnsiStrings by ordinal value without case sensitivity.
CreateDir
Creates a new directory.
Currency and date/time formatting variables
Influence the way numeric or date/time values are formatted.
CurrentYear
Returns current year.
CurrToStr
Formats a Currency value as an AnsiString.
CurrToStrF
Converts a Currency value to an AnsiString, using a specified format.
Date
Returns the current date.
DateDelta constant
Specifies the difference between TDateTime and TTimeStamp values.
DateTimeToFileDate
Converts a TDateTime object to an OS timestamp.
DateTimeToStr
Converts a TDateTime value to an AnsiString.
DateTimeToString
Converts a TDateTime object to an AnsiString using a specified Format.
DateTimeToSystemTime
Converts a TDateTime object into the Win32 API's _SYSTEMTIME type.
DateTimeToTimeStamp
Converts a TDateTime object into the corresponding TTimeStamp structure.
DateToStr
Converts a TDateTime object to an AnsiString object.
DayOfWeek
Returns the day of the week for a specified date.
DecodeDate
Returns Year, Month, and Day values for a TDateTime object.
DecodeDateFully
Returns Year, Month, and Day, and Day-of-Week values for a TDateTime object.
DecodeTime
Breaks a TDateTime object into hours, minutes, seconds, and milliseconds.
DeleteFile
Deletes a file from disk.
DiskFree
Returns the number of free bytes on a specified drive.
DiskSize
Returns the size, in bytes, of a specified drive.
DisposeStr
Disposes of an AnsiString pointer that was allocated using NewStr.
EncodeDate; TryEncodeDate
Returns a TDateTime object that represents a specified Year, Month, and Day.
EncodeTime;TryEncodeTime
Returns a TDateTime object for a specified Hour, Min, Sec, and MSec.
ExceptionErrorMessage
Formats a standard error message.
ExcludeTrailingBackslash
Returns a path name without a trailing delimiter.
ExcludeTrailingPathDelimiter
Returns a path name without a trailing delimiter.
ExpandFileName
Returns the full path name for a relative file name.
ExpandUNCFileName
Returns the full path of a file name in UNC format, if appropriate.
ExtractFileDir
Extracts the drive and directory parts from FileName.
ExtractFileDrive
Returns the drive portion of a file name.
ExtractFileExt
Returns the extension portions of a file name.
ExtractFileName
Extracts the name and extension parts of a file name.
ExtractFilePath
Returns the drive and directory portions of a file name.
ExtractRelativePath
Returns a relative path name, relative to a specific base directory.
ExtractShortPathName
Converts a file name to the short 8.3 form.
FalseBoolStrs
Lists strings that can represent the boolean value false.
File open mode constants
File open mode constants are used to control the access mode to a file or
stream.
FileAge
Returns the OS timestamp of a file.
FileClose
Closes a specified file.
FileCreate
Creates a new file.
FileDateToDateTime
Converts an OS timestamp value to TDateTime object.
FileExists
Tests if a specified file exists.
FileGetAttr
Returns the file attributes of FileName.
FileGetDate
Returns an OS timestamp for a specified file.
FileIsReadOnly
Report if file is read-only.
FileOpen
Opens a specified file using a specified access mode.
FileRead
Reads a specified number of bytes from a file.
FileSearch
Searches a specified directory path for a file.
FileSeek
Repositions read/write point.
FileSetAttr
Sets the file attributes of a specified file.
FileSetDate
Sets the OS time stamp for a specified file.
FileSetReadOnly
Sets the file permissions to read-only.
FileWrite
Writes the contents of a buffer to the current position in a file.
FinalizePackage
Finalizes the specified package .BPL.
FindClose
Releases memory allocated by FindFirst.
FindCmdLineSwitch
Determines whether a string was passed as a command line argument to the
application.
FindFirst
Searches for the first instance of a file name with a given set of
attributes in a specified directory.
FindNext
Returns the next entry matching the name and attributes specified in a
previous call to FindFirst.
FloatToCurr ;TryFloatToCurr
Converts a floating-point value to a Currency value.
FloatToDateTime ;TryFloatToDateTime
Converts a floating-point value to a TDateTime value.
FloatToDecimal
Converts a floating-point value to a decimal representation.
FloatToStr
Converts a floating point value to an AnsiString.
FloatToStrF
Converts a floating point value to an AnsiString, using a specified Format,
Precision, and Digits.
FloatToText
Converts a floating-point value to an unterminated character string, using a
specified Format, Precision and Digits.
FloatToTextFmt
Converts a floating-point value to to an unterminated character string,
using a specified format.
FmtLoadStr
Returns formatted output using a resourced format string.
FmtStr
Assembles a formatted string using a format string and an array of
arguments.
Format
Returns a formatted string assembled from a format string and an array of
arguments.
FormatBuf
Formats the arguments from an array, placing the result in a buffer.
FormatCurr
Formats a Currency object.
FormatDateTime
Formats a TDateTime object.
FormatFloat
Formats a floating point value.
FreeAndNil
Frees an object reference and replaces the reference with NULL..
GetCurrentDir
Returns the name of the current directory.
GetEnvironmentVariable
Returns environment variable value.
GetFormatSettings
Resets the date and number format parameters to initial values.
GetPackageDescription
Returns the description resource from a package.
GetPackageInfo
Enumerates all the units and required packages for a package.
GUIDToString
Converts a class identifier GUID to an AnsiString.
IncAMonth
Increments date data by one month.
IncludeTrailingBackslash
Ensures path name ends with delimiter
IncludeTrailingPathDelimiter
Ensures path name ends with delimiter.
IncMonth
Returns a date shifted by a specified number of months.
InitializePackage
Validates and initializes a given package.
IntToHex
Returns the hex representation of an integer.
IntToStr
Converts an integer to an AnsiString.
IsDelimiter
Indicates whether a specified character in a string matches one of a set of
delimiters.
IsEqualGUID
Indicates whether two TGUIDs are the same.
IsLeapYear
Indicates whether a specified year is a leap year.
IsPathDelimiter
Indicates whether the byte at position Index of a string is the path
delimiter.
IsValidIdent
Tests for a valid C++ identifier.
Languages
Lists the locales for which support is available.
LastDelimiter
Returns the byte index in S of the last character that matches any character
in the Delimiters AnsiString.
LeadBytes variable
Lists all values that can be the first byte of a double byte character on
the local system.
LoadPackage
Loads a specified package.
LoadStr
Loads a string resource from the application's executable file.
LowerCase
Converts an ASCII string to lowercase.
MSecsToTimeStamp
Converts a specified number of milliseconds into a TTimeStamp value.
NewStr
Allocates an AnsiString on the heap.
NextCharIndex
Returns the byte index of the next character.
Now
Returns the current date and time.
NullStr constant
Declares a pointer to an empty string.
OutOfMemoryError
Throws an EOutOfMemory exception.
QuotedStr
Returns the quoted version of an AnsiString.
RaiseLastOSError procedure
Throws an exception for the last occurring OS or system library error.
RaiseLastWin32Error
Throws an exception for the last occurring Win32 error.
RemoveDir
Deletes an existing empty directory.
RenameFile
Changes a file name.
ReplaceDate
Replaces the date portion of a TDateTime value with a specified date.
ReplaceTime
Replaces the time portion of a TDateTime value with a specified time.
SafeLoadLibrary function
Loads a DLL while suppressing error dialogs and preventing the DLL from
changing the FPU control word.
SameFileName
Compares file names based on the current locale.
SameText
Compares two AnsiStrings by ordinal value without case sensitivity.
SetCurrentDir
Sets the current directory.
ShowException
Displays an exception message with its physical address
StrAlloc
Allocates a buffer for a null-terminated string and returns a pointer to its
first character.
StrBufSize
Returns the maximum number of characters that can be stored in a buffer
allocated by StrAlloc.
StrByteType
Indicates whether a byte in a string is a single byte character, the first
byte of a double byte character, or the second byte of a double byte
character.
StrCat
Appends a copy of Source to the end of Dest and returns the concatenated
string.
StrCharLength
Find character size.
StrComp
Compares two strings with case sensitivity.
StrCopy
Copies Source to Dest and returns Dest.
StrDispose
Disposes of a string.
StrECopy
Copies null-terminated string.
StrEnd
Returns a pointer to the end of a null terminated string.
StrFmt
Formats entries in an array.
StrIComp
Compares two strings without case sensitivity.
StringReplace
Returns an AnsiString with occurrences of one substring replaced by another
substring.
StringToGUID
Converts an AnsiString to a GUID.
StrLCat
Appends up to a specified maximum number of characters to string.
StrLComp
Compares up to a specified maximum number of characters in two strings.
StrLCopy
Copies up to a specified maximum number of characters from Source to Dest.
StrLen
Returns number of characters in a string excluding the null terminator.
StrLFmt
Formats a series of arguments from a specified array into a buffer.
StrLIComp
Compares strings up to a specified maximum number of characters, without
case sensitivity.
StrLower
Converts a string to lowercase.
StrMove
Copies specified number of characters to string.
StrNew
Allocates space on and copies a string to the heap; returning a pointer to
the string.
StrNextChar
Returns pointer to following character.
StrPas
Converts null-terminated string to an AnsiString.
StrPCopy
Copies an AnsiString to a null-terminated string.
StrPLCopy
Copies characters from an AnsiString into a null-terminated string.
StrPos
Returns a pointer to the first occurrence of STR2 in STR1.
StrRScan
Returns a pointer to the last occurrence of a specified character in a
string.
StrScan
Returns a pointer to first occurrence of a specified character in a string.
StrToBool
Converts an AnsiString to a Boolean value.
StrToBoolDef
Converts an AnsiString to a Boolean value, with error default.
StrToCurr
Converts an AnsiString to a Currency object.
StrToCurrDef
Converts an AnsiString to a Currency object, with error default.
StrToDate
Converts an AnsiString object to a TDateTime object.
StrToDateDef
Converts an AnsiString object to a TDateTime object, with error default.
StrToDateTime
Converts an AnsiString object to a TDateTime object.
StrToDateTimeDef
Converts an AnsiString object to a TDateTime object with error default.
StrToFloat
Converts a given string to a floating-point value.
StrToFloatDef
Converts a given string to a floating-point value with error default.
StrToInt64
Converts an AnsiString that represents an integer (decimal or hex notation)
to a number.
StrToInt64Def
Converts an AnsiString that represents an integer (decimal or hex notation)
to a number.
StrToInt
Converts an AnsiString that represents an integer (decimal or hex notation)
to a number.
StrToIntDef
Converts an AnsiString that represents an integer (decimal or hex notation)
to a number with error default.
StrToTime
Converts an AnsiString object to a TDateTime object.
StrToTimeDef
Converts an AnsiString object to a TDateTime object with error default.
StrUpper
Returns a string in upper case.
Supports
Indicates whether a given object or interface supports a specified
interface.
SysErrorMessage
Converts OS error codes into AnsiStrings.
SystemTimeToDateTime
Converts a _SYSTEMTIME value into a TDateTime objectvalue.
Time
Returns the current time.
TimeStampToDateTime
Converts a TTimeStamp value into the corresponding TDateTime object.
TimeStampToMSecs
Converts a TTimeStamp value into an absolute number of milliseconds.
TimeToStr
Returns an AnsiString that represents a TDateTime object.
Trim
Trims leading and trailing spaces and control characters from a string.
TrimLeft
Trims leading spaces and control characters from a string.
TrimRight
Trims trailing spaces and control characters from a string.
TrueBoolStrs
Lists strings that can represent the boolean value true.
TryStrToBool
Converts an AnsiString to a Boolean value, with Boolean success code.
TryStrToCurr
Converts an AnsiString to a Currency object, with Boolean success code.
TryStrToDate
Converts an AnsiString object to a TDateTime object, with Boolean success
code.
TryStrToDateTime
Converts an AnsiString object to a TDateTime object with Boolean success
code.
TryStrToFloat
Converts a given string to a floating-point value with Boolean success code.
TryStrToInt64
Converts an AnsiString that represents an integer (decimal or hex notation)
to a number.
TryStrToInt
Converts an AnsiString that represents an integer (decimal or hex notation)
to a number with Boolean success code.
TryStrToTime
Converts an AnsiString object to a TDateTime object with error default.
UnixDateDelta constant
Specifies the difference between TDateTime and TIME_T values.
UnloadPackage
Unloads a package.
UpperCase
Returns a copy of an AnsiString in uppercase.
WideCompareStr
Compares Unicode strings based on the current locale with case sensitivity.
WideCompareText
Compares Unicode strings based on the current locale without case
sensitivity.
WideFmtStr
Assembles a formatted Unicode string using a format string and an array of
arguments.
WideFormat
Returns a formatted Unicode string assembled from a format string and an
array of arguments.
WideFormatBuf
Formats the arguments from an array, placing the result in a buffer.
WideLowerCase
Returns Unicode string converted to lower case.
WideSameStr
Compares Unicode strings based on the current locale with case sensitivity.
WideSameText
Compares Unicode strings based on the current locale without case
sensitivity.
WideUpperCase
Returns Unicode string converted to upper case.
Win32Check
Checks the return value of a Windows API call and throws an appropriate
exception when it indicates failure.
Win32Platform variable
Specifies the Win32 platform identifier.
WrapText
Splits an AnsiString into multiple lines as its length approaches a
specified size.
Aggro
> Joo näin aattelinkin sen tehdä, mutta millä komennoilla merkkijonoa
> tutkitaan?
Esimerkiksi näin:
#include <string>
int main()
{
std::string str = "abc";
if( str[0] == 'a' )
{
}
return 0;
}
Voit tietty myös etsiä merkkijonosta tiettyä merkkijonoa, esim. find():n
avulla, täällä on esimerkki:
http://www.cppreference.com/wiki/string/find
Tästä listasta voi löytyä muuta mielenkiintoista:
http://www.cppreference.com/wiki/string/start
Petteri Kautonen
>> Joo näin aattelinkin sen tehdä, mutta millä komennoilla merkkijonoa
>> tutkitaan?
>
> Sysutilsseista löytyy läjä vaikka ja mitä. Kyllä ne kääntäjän
> helpeistä, jos moisessa on IDE, löytyy oikein helposti.
>
> AnsiCompareStr
Taitaa muo Ansi-alkuiset olla C++ Builder -/ Delphi-spesifisiä.
nikolas mäki
Netistä löytyy vaikka mitä c++ -juttua. Myös mikkisoftan nettisivuilta
voi etsiä c/c++ -juttua. Tietysti on se vanhanaikainen paperivaihtoehto:
joko kirjan osto tai kirjastosta lainaus.
Matti Lehtiniemi
> http://www.cppreference.com/wiki/string/find
>
> Tästä listasta voi löytyä muuta mielenkiintoista:
> http://www.cppreference.com/wiki/string/start
Jos on vanha c-ohjelmoija , niin string:stä saa c_str() :n avulla vanhan
C-mallisen stringin.
Sitten voi käyttää strcmp () funktioita jne.
Mutta ei kai tuon find():n ja substr():n opettelu nyt kovin vaikeaa ole.
Matti