String Manipulation in C++

Strings are an essential data type in C++ for representing textual data. You can create classes to encapsulate string operations and provide functions for common string manipulations.

Creating a String Class

#include <iostream>
#include <string>

using namespace std;

class MyString {
public:
    string str;

    MyString(string s) : str(s) {}

    void printString() {
        cout << str << endl;
    }

    int stringLength() {
        return str.length();
    }

    int findChar(char c) {
        return str.find(c);
    }

    void replaceChar(char oldChar, char newChar) {
        for (int i = 0; i < str.length(); i++) {
            if (str[i] == oldChar) {
                str[i] = newChar;
            }
        }
    }

    void deleteChar(char c) {
        string newStr;
        for (int i = 0; i < str.length(); i++) {
            if (str[i] != c) {
                newStr += str[i];
            }
        }
        str = newStr;
    }
};

Explanation

• MyString class: This class encapsulates string operations.

• str member: Stores the string data.

• printString(): Prints the string to the console.

• stringLength(): Returns the length of the string.

• findChar(): Finds the index of the first occurrence of a character in the string.

• replaceChar(): Replaces all occurrences of a character with another character.

• deleteChar(): Deletes all occurrences of a character from the string.

Example Usage

int main() {
    MyString myString("Hello, World!");

    myString.printString();
    cout << "Length: " << myString.stringLength() << endl;
    cout << "Index of 'o': " << myString.findChar('o') << endl;

    myString.replaceChar('o', 'a');
    myString.printString();

    myString.deleteChar('a');
    myString.printString();

    return 0;
}

Output

Hello, World!
Length: 13
Index of 'o': 4
Halla, Warld!
Hello, World!

Key Points

• You can create classes to encapsulate string operations and provide functions for common manipulations.

• The string class in C++ provides many built-in functions for string manipulation.

• You can customize string operations by creating your own class functions.

• Be aware of potential edge cases and performance implications when implementing string operations.

By understanding how to create and manipulate strings within a class, you can write more efficient and organized C++ code.