C++ Exercises: Reverse a string

#include <iostream> // Including the input-output stream library
using namespace std; // Using standard namespace

// Function declaration to reverse the string recursively
void revOfString(const string& a);

int main() // Main function
{
    string str; // Declaring a string variable 'str'

    // Displaying a message to reverse a string
    cout << "\n\n Reverse a string:\n";
	cout << "----------------------\n";

	// Asking the user to enter a string
	cout << " Enter a string: ";
    getline(cin, str); // Taking the entire line as input and storing it in 'str'

    // Displaying a message before printing the reversed string
    cout << " The string in reverse are: ";

    // Calling the reverse string function
    revOfString(str);

    return 0; // Returning 0 to indicate successful execution
}

// Function definition to reverse the string recursively
void revOfString(const string& str)
{
    size_t lengthOfString = str.size(); // Getting the length of the string

    // Checking if the length of the string is 1, then simply print the character and end the line
    if (lengthOfString == 1)
       cout << str << endl;
    else
    {
        // Print the last character of the string
        cout << str[lengthOfString - 1];

        // Recursively call the function by passing the substring from 0 to length - 1
        revOfString(str.substr(0, lengthOfString - 1));
    }
}