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C++ program to reverse every word of a string using class

Submitted by Shubh Pachori, on September 08, 2022

Problem statement

Given a string, we have to reverse every word of a string using the class and object approach.

Example:

Input:
Enter String : who is there

Output:
Reverse : ohw si rehte

C++ code to reverse every word of a string using the class and object approach

#include <bits/stdc++.h>
using namespace std;

// create a class
class String {
  // private data member
 private:
  string str;

  // public member functions
 public:
  // getString() function to store string
  void getString() {
    cout << "Enter String: ";
    getline(cin, str);
  }

  // reverseCharacter() function to 
  // reverse character in the string
  string reverseCharacter() {
    // initialising int type variables 
    // to perform operations
    int length, index_1, index_2 = 0;

    // calculating length of inputted string
    length = str.size();

    // for loop to reverse the words of the string
    for (index_1 = 0; index_1 < length; index_1++) {
      // if condition for spaces
      if (str[index_1] == ' ') {
        reverse(str.begin() + index_2, str.begin() + index_1);
        index_2 = index_1 + 1;
      }
      // else if condition for last word
      else if (index_1 == length - 1) {
        reverse(str.begin() + index_2, str.end());
      }
    }

    // returning the string
    return str;
  }
};

int main() {
  // create an object
  String S;

  // string variable to store 
  // the string
  string str;

  // calling getString() function to 
  // input string
  S.getString();

  // calling reverseCharacter() function 
  // to reverse character
  str = S.reverseCharacter();

  cout << "Reverse : " << str << endl;

  return 0;
}

Output

RUN 1:
Enter String: Hello World!
Reverse : olleH !dlroW

RUN 2:
Enter String: Welcome at IncludeHelp
Reverse : emocleW ta pleHedulcnI

Explanation

In the above code, we have created a class String, one string type data members str to store the string, and public member functions getString() and reverseCharacter() to store the string and to reverse every character of every word of the string.

In the main() function, we are creating an object S of class String, reading the inputted string by the user using getString() function, and finally calling the reverseCharacter() member function to reverse every character of every word of the string. The reverseCharacter() function contains the logic to reverse every character of every word of the string and printing the result.

C++ Class and Object Programs (Set 2) »