Question

C++ I took 7/20 =(

code:

#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;
}

(1) Prompt the user to enter a string of their choosing. 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. (3 pts)

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. (4 pts)

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. (3 pts)

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. (3 pts)

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 output the string. Call ReplaceExclamation() in the PrintMenu() function, and then output the edited string. (3 pts)

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 output the string. Call ShortenSpace() in the PrintMenu() function, and then output the edited string. (3 pt)

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!

Answer 1

Note:

While executing function for replacing '!' with '.' and shortening the string I have not modified the original string but performed manipulations on a copy of the string.

#include <iostream>
#include <string>


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 (!isspace(str[i])) { //Considers all the non-whitespace charatcers
            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=str; //First copy the entire contents of the string to new one and then update the new string
    while (str[i] != '\0') {
        if (str[i] == '!') {
            edited[i] = '.';
        }
        else {
            edited[i] = str[i];
        }
        i++;
    }

    // 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();
    bool space=false;
    string edited=str; //Copy entire contents of original string to new one
    while(j < len){
        if(edited[j] != ' '){
            edited[i++]=edited[j++];
            space=false; //no space found thus, setting variable to false
        }
        else if(edited[j++] == ' '){
            if(!space){
                edited[i++]=' '; //Only one space is appended in the string
                space=true;
            }
        }
    }
    edited[i]='\0';

    // display resulting string
    int k = 0;
    cout << "Edited Text:\n" << endl;
    while (edited[k] != '\0') {       //iterate in edited string only till coiunter i as i marks the end of edited string
        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:\n" << endl;
    getline(file, text);
    cout << "\nYou entered:\n" << text << endl;

    // call print menu function
    PrintMenu(text);

    return 0;
}

Attaching screenshots for the output of the program