Examples

String manipulation methods

CdString SubStr(int nStartPosition, int nCount)

Returns the nCount number of characters from the start position.
E.g.:

CdString data = "Muehlbauer";
data.SubStr(0,4);

the above code returns the first 4 characters of the string Muehlbauer.
Output: Mueh

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int Find(const CdString & sSearchString, int nOccurrence = 1)

Returns the postion of the given string.
E.g.:

CdString data = "Muehlbauer";
data.Find("e");

the above code returns the position of the first instance of 'e' in the string Muehlbauer.
Output: 2

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int Compare(const char * szOther )

Returns the bool value after comparing two strings.

E.g.:

CdString sData1 = "Muehlbauer";
CdString sData2 = "Muehlbauer";

sData1.Compare(sData2);

the above code compares sData1 with sData2.
Output: -1

Return value	Indicates
<0	The first character that does not match or has a lower value in sData1 than in sData2
0	The contents of both strings are equal
>0	The first character that does not match or has a greater value in sData1 than in sData2

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CdString & Append( const char cOther )

Returns the length of the string.
E.g.:

CdString sData1 = "Muehlbauer";
CdString sData2 = " je super";

sData1.Append(sData2);

the above code appends the string sData2 to sData1.
Output: "Muehlbauer je super"

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bool Empty()

Clears the variable data.
E.g.:

CdString data = "Muehlbauer";
data.Empty();

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bool MakeLower()

Changes the string to lower case.
E.g.:

CdString data = "Muehlbauer";
data.MakeLower();

Output: muehlbauer

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bool MakeUpper()

Changes the string to upper case.
E.g.:

CdString data = "Muehlbauer";
data.MakeLower();

Output: MUEHLBAUER

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Get methods

int GetLength()

Returns the length of the string.
E.g.:

CdString data = "Muehlbauer";
data.GetLength();

the above code returns the length of the string Muehlbauer.
Output: 10

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bool IsEmpty()

Checks whether the given string is empty.
E.g.:

CdString data = "Muehlbauer";
data.IsEmpty();

the above code returns a bool value after checking the string.
Output: false

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Code

CdString sStr1 = "Muehlbauer";
CdString sStr2 = "ja super";

//SubStr
po_ELOG("CdStringMethods") << sStr1.SubStr(0,4) << CLOSELOG; //Outputs: Mueh

//Find
po_ELOG("CdStringMethods") << sStr1.Find('e') << CLOSELOG; //Outputs: 2

//Compare
po_ELOG("CdStringMethods") << sStr1.Compare(sStr2) << CLOSELOG; //Outputs: -1

//GetLength
po_ELOG("CdStringMethods") << sStr1.GetLength() << CLOSELOG; //Outputs: 10

//IsEmpty
po_ELOG("CdStringMethods") << sStr1.IsEmpty() << CLOSELOG; //Outputs: (bool)false

//MakeLower
sStr1.MakeLower();
po_ELOG("CdStringMethods") << sStr1 << CLOSELOG; //Outputs: muehlbauer

//MakeUpper
sStr1.MakeUpper();
po_ELOG("CdStringMethods") << sStr1 << CLOSELOG; //Outputs: MUEHLBAUER

//Append
sStr1.Append(sStr2);
po_ELOG("CdStringMethods") << sStr1 << CLOSELOG; //Outputs: MUEHLBAUERja super

//Empty
sStr1.Empty();
po_ELOG("CdStringMethods") << sStr1 << CLOSELOG;//Empty string

Operators

Code:

CdString sStr1 = "Hello";
CdString sStr2 = "World";

// Concatenation
CdString sStr3 = sStr1 + " " + sStr2;
po_ELOG("CdStringMethods") << "Concatenated String: " << sStr3 << CLOSELOG; 

// Using concatenation assignment operator
sStr1 += "!";
po_ELOG("CdStringMethods") << "After appending: " << sStr1 << CLOSELOG; 

// Equality checks
po_ELOG("CdStringMethods") << "Is sStr1 equal to sStr3? " << (sStr1 == sStr3) << CLOSELOG; 
po_ELOG("CdStringMethods") << "Is sStr1 not equal to sStr3? " << (sStr1 != sStr3) << CLOSELOG; 

// Accessing characters using indexing operator
po_ELOG("CdStringMethods") << "First character of sStr1: " << sStr1[0] << CLOSELOG; 
sStr1[0] = 'h';
po_ELOG("CdStringMethods") << "Modified sStr1: " << sStr1 << CLOSELOG;

sStr1 = "Apple";
sStr2 = "Banana";
// Comparison operators
po_ELOG("CdStringMethods") << "Is sStr1 < sStr2? " << (sStr1 < sStr2) << CLOSELOG;
po_ELOG("CdStringMethods") << "Is sStr1 > sStr2? " << (sStr1 > sStr2) << CLOSELOG; 
po_ELOG("CdStringMethods") << "Is sStr1 <= sStr2? " << (sStr1 <= sStr2) << CLOSELOG;
po_ELOG("CdStringMethods") << "Is sStr1 >= sStr2? " << (sStr1 >= sStr2) << CLOSELOG; 

// Conversion operator
const char* cstr = sStr1; // Implicit conversion to const char*
po_ELOG("CdStringMethods") << "C-style string: " << cstr << CLOSELOG;//Outputs: Apple

Output:

Concatenated String: Hello World
After appending: Hello!
Is sStr1 equal to sStr3? (bool)false
Is sStr1 not equal to sStr3? (bool)true
First character of sStr1: 'H'
Modified sStr1: hello!
Is sStr1 < sStr2? (bool)true
Is sStr1 > sStr2? (bool)false
Is sStr1 <= sStr2? (bool)true
Is sStr1 >= sStr2? (bool)false
C-style string: Apple

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