Question

C++

(1) Prompt the user to enter a string of their choosing (Hint: you will need to call the getline() function to read a string consisting of white spaces.) Store the text in a string. Output the string. (1 pt)

Ex:

Enter a sample text:
We'll continue our quest in space.  There will be more shuttle flights and more shuttle crews and,  yes,  more volunteers, more civilians,  more teachers in space.  Nothing ends here;  our hopes and our journeys continue!

You entered: We'll continue our quest in space.  There will be more shuttle flights and more shuttle crews and,  yes,  more volunteers, more civilians,  more teachers in space.  Nothing ends here;  our hopes and our journeys continue!

(2) Implement a PrintMenu() function, which has a string as a parameter, outputs a menu of user options for analyzing/editing the string, and returns the user's entered menu option. Each option is represented by a single character. If an invalid character is entered, continue to prompt for a valid choice. Hint: Implement Quit before implementing other options.

Call PrintMenu() in the main() function. Continue to call PrintMenu() until the user enters q to Quit.

More specifically, the PrintMenu() function will consist of the following steps:

• print the menu
• receive an end user's choice of action (until it's valid)
• call the corresponding function based on the above choice

Ex:

MENU
c - Number of non-whitespace characters
w - Number of words
f - Find text
r - Replace all !'s
s - Shorten spaces
q - Quit

Choose an option:

(3) Implement the GetNumOfNonWSCharacters() function. GetNumOfNonWSCharacters() has a constant string as a parameter and returns the number of characters in the string, excluding all whitespace. Call GetNumOfNonWSCharacters() in the PrintMenu() function.

Ex:

Number of non-whitespace characters: 181

(4) Implement the GetNumOfWords() function. GetNumOfWords() has a constant string as a parameter and returns the number of words in the string. Hint: Words end when a space is reached except for the last word in a sentence. Call GetNumOfWords() in the PrintMenu() function.

Ex:

Number of words: 35

(5) Implement the FindText() function, which has two strings as parameters. The first parameter is the text to be found in the user provided sample text, and the second parameter is the user provided sample text. The function returns the number of instances a word or phrase is found in the string. In the PrintMenu() function, prompt the user for a word or phrase to be found and then call FindText() in the PrintMenu() function. Before the prompt, call cin.ignore() to allow the user to input a new string.

Ex:

Enter a word or phrase to be found:
more
"more" instances: 5

(6) Implement the ReplaceExclamation() function. ReplaceExclamation() has a string parameter and updates the string by replacing each '!' character in the string with a '.' character. ReplaceExclamation() DOES NOT return the revised string. Call ReplaceExclamation() in the PrintMenu() function, and then output the edited string.

Ex.

Edited text: We'll continue our quest in space.  There will be more shuttle flights and more shuttle crews and,  yes,  more volunteers, more civilians,  more teachers in space.  Nothing ends here;  our hopes and our journeys continue.

(7) Implement the ShortenSpace() function. ShortenSpace() has a string parameter and updates the string by replacing all sequences of 2 or more spaces with a single space. ShortenSpace() DOES NOT return the revised string. Call ShortenSpace() in the PrintMenu() function, and then output the edited string.

Ex:

Edited text: We'll continue our quest in space. There will be more shuttle flights and more shuttle crews and, yes, more volunteers, more civilians, more teachers in space. Nothing ends here; our hopes and our journeys continue!

______________________________________________

#include <iostream>
#include <string>
using namespace std;

int main() {

/* Type your code here. */

return 0;
}

Answer 1

#include <iostream>
#include<string.h>

using namespace std;

// function to calculate number non white space characters
int GetNumOfNonWSCharacters(string str) {
   int i = 0;
   int count = 0;
   while(str[i] != '\0') {
      if(str[i] != ' ') {
         count += 1;
      }
      i++;
   }
   return count;
}

// function to calculate numbers of words
int GetNumOfWords(string str) {
   int i = 0;
   int count = 1;
   while(str[i] != '\0') {
      if(str[i] == ' ' && str[i-1] != ' ') {
         count += 1;
      }
      i++;
   }
   return count;
}


// function to find the number of occurence of the word
int FindText(string word, string str) {
   int i = 0;
   int count = 0;
   while(str[i] != '\0') {
      if(str[i] == word[0]) {
         int k = i;
         int j = 0;
         while(word[j] != '\0') {
            if(word[j] != str[k]) {
               break;
            }
            if(word[j+1] == '\0') {
               count += 1;
            }
            k++;
            j++;
         }
      }
      i++;
   }
   return count;
}


// function to replace the '!' in string
void ReplaceExclamation(string str) {
   int i = 0;
   string edited;
   while(str[i] != '\0') {
      if(str[i] == '!') {
         edited[i] = '.';
      }
      else {
         edited[i] = str[i];
      }
      i++;
   }
   edited[i] = '\0';

   // display resulting string
   int j = 0;
   cout << "Edited Text:\n" << endl;
   while(edited[j] != '\0') {
      cout << edited[j];
      j++;
   }
   cout << endl;
}


// function to remove extra spaces
void ShortenSpace(string str) {
   int i = 0;
   int j = 0;
   int len = str.length();
   string edited;
   while(str[i] != '\0') {
      if(str[i] != ' ') {
         edited[j] = str[i];
         j++;
      }
      else {
         if(edited[j-1] != ' ') {
            edited[j] = ' ';
            j++;
         }
         
      }
      i++;
   }
   edited[j] = '\0';

   // display resulting string
   int k = 0;
   cout << "Edited Text:\n" << endl;
   while(edited[k] != '\0') {
      cout << edited[k];
      k++;
   }
   cout << endl;
}


// function to display menu options
void PrintMenu(string str) {
   while(1) {

      // display menu
      cout << "MENU" << endl;
      cout << "c - Number of non-whitespace characters" << endl;
      cout << "w - Number of words" << endl;
      cout << "f - Find text" << endl;
      cout << "r - Replace all !'s" << endl;
      cout << "s - Shorten spaces" << endl;
      cout << "q - Quit" << endl;

      // read user option
      char option;
      cout << "Choose an option: ";
      cin >> option;
      
      // validate input
      while(1) {
         if(option != 'c' && option != 'w' && option != 'r' && option != 's' && option != 'q' && option != 'f') {
            cout << "Choose an option: ";
            cin >> option;
         }
         else{
            break;
         }
      }

      // perform the required operation
      if(option == 'q') {
         break;
      }

      else if(option == 'c') {
         int non_whitespace_chars = GetNumOfNonWSCharacters(str);
         cout << "Number of non-whitespace characters: " << non_whitespace_chars << endl;
      }

      else if(option == 'w') {
         int num_words = GetNumOfWords(str);
         cout << "Number of words: " << num_words << endl;
      }

      else if(option == 'f') {
         string word;
         cin.ignore();
         getline(cin, word);
         int finds = FindText(word, str);
         cout << "Number of words or phrases found: " << finds << endl;
      }

      else if(option == 'r') {
         ReplaceExclamation(str);
      }

      else {
         ShortenSpace(str);
      }

      cout << endl;
   }
}


// main function
int main() {

   // read input text and output it
   string text;
   cout << "Enter sample text:" << endl;
   getline(cin, text);
   cout << "You entered:\n" << text << endl;

   // call print menu function 
   PrintMenu(text);

   return 0;
}

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