C++ program to Reverse a String using recursion

What are Functions ?

Function is a block of statements that performs some operations. All C++ programs have at least one function – function called “main()”. This function is entry-point of your program.

A function declaration tells the compiler about a function’s name, return type, and parameters. A function definition provides the actual body of the function.

Defining a Function : :

The general form of a C++ function definition is as follows:

return_type Function_Name( list of parameters )
{
//function’s body
}

• return_type : suggests what the function will return. It can be void, int, char, some pointer or even a class object.
• Function_Name : is the name of the function, using the function name it is called.
• Parameters : are variables to hold values of arguments passed while function is called. A function may or may not contain parameter list.
• Function body : is he part where the code statements are written.

Below is the source code for C++ program to Reverse a String using recursion which is successfully compiled and run on Windows System to produce desired output as shown below :

SOURCE CODE : :

/*  C++ program to Reverse a String using recursion  */

#include <iostream>
using namespace std;

void reverse(const string& a);

int main()
{
    string str;
    cout << "\nPlease Enter any string :: ";
    getline(cin, str);

    cout<<"\nReverse of String [ "<<str<<" ] is :: ";
    reverse(str);

    return 0;
}

void reverse(const string& str)
{
    size_t numOfChars = str.size();

    if(numOfChars == 1)
       cout << str << endl;
    else
    {
       cout << str[numOfChars - 1];
       reverse(str.substr(0, numOfChars - 1));
    }
}

OUTPUT : :

/*  C++ program to Reverse a String using recursion  */

Please Enter any string :: CodezClub

Reverse of String [ CodezClub ] is :: bulCzedoC

Process returned 0

Above is the source code for C++ program to Reverse a String using recursion which is successfully compiled and run on Windows System.The Output of the program is shown above .