Silly Substitution Story

#include<iostream>
#include <string>
#include <vector>

using namespace std;

/*
This program creates a silly substitution story by
replacing words in normal text with words
provided by user.

In a vector, the element at each index below
should be the type of word needed at different
places in the story. The user is
prompted to enter the right type of word.
0 - part of the body
1 - adjective
2 - animal
3 - different part of the body
4 - silly word
5 - cartoon character
6 - silly word, start with a capital letter
7 - verb
The story is one string. Each substitution point in
the string is marked with a number that corresponds
to the array index of the word for the substitution.
*/

int main()
{
    // This is the story which will be have words inserted to
    // make it sound silly.
    string story = "New, [0]-less dinosaur discovered.\n"
        "\nLast week, a team of scientists discovered a 5-miilion-year-old fossil with a very [1], [2]-like [3]. They are excited to announce that "
        "they\'ve found a new species of [0]-less dinosaur. It seems to belong to the sub-group [4], in which all members had at least "
        "one [0]. Now all that has changed.\n"
        "\n\"With the discovery of this [0]-less dinosaur, we now have to re-examine [0] loss for all members of [4],\" "
        "says [5], a dinosaur enthusiast and founder of the [6] Dinosaur Institute. "
        "\"This discovery is going to revolutionize the way we [7] and how we see these amazing pre-historic creatures.\"\n";
    vector<string> substitutions; // List of words provided by the user to substitute into the story.
    string input; // User input.

    cout << "Let's create a silly substitution story!\n"
    "Enter 8 words to substute into a normal story, to make the story silly:\n";
    cout << "1. a part of the body: "; // Request the type of word needed for the story.
    getline(cin, input); // Get user input.
    substitutions.push_back(input); // Add user input to list of words to substitute.
    cout << "2. an adjective: ";
    getline(cin, input);
    substitutions.push_back(input);
    cout << "3. an amimal: ";
    getline(cin, input);
    substitutions.push_back(input);
    cout << "4. a different part of the body: ";
    getline(cin, input);
    substitutions.push_back(input);
    cout << "5. a silly word: ";
    getline(cin, input);
    substitutions.push_back(input);
    cout << "6. a cartoon character: ";
    getline(cin, input);
    substitutions.push_back(input);
    cout << "7. a different silly word, starting with a capital letter: ";
    getline(cin, input);
    substitutions.push_back(input);
    cout << "8. a verb: ";
    getline(cin, input);
    substitutions.push_back(input);

    string marker; // Some text in the story that marks where to insert silly words.
    string opening_bracket = "["; // Used to make the marker.
    string closing_bracket = "]"; // Used to make the marker.
    string index_as_string; // The vector index is converted to a string for the marker.

    // Take each item in the substitutions vector, in order,
    for (size_t i = 0; i < substitutions.size(); ++i)
    {
        // Create the substitution marker to search for.
        // It is the vector index in square brackets, like [3]
        index_as_string = to_string(i); // Make a string version of the current index.
        // Assemble the marker.
        marker = opening_bracket + index_as_string + closing_bracket;

        size_t search_start = 0; // Start searching at the beginning of the story.
        size_t marker_location = 0; // This stores the location when the marker if found
        bool  whole_string_searched = false; // Assume the string is not searched yet.
        // Go through the story, character by character,
        while (whole_string_searched == false)
        {
            // Locate the marker
            marker_location = story.find(marker, search_start);
            if (marker_location != std::string::npos) // If we haven't reached the end of the story,
            {
                // Replace the marker with the text from the vector, at the current index.
                story.replace(marker_location, marker.size(), substitutions[i]);
                search_start = marker_location; // Continue searching from here.
            }
            // Otherwise, we've reached the end of the string, so indicate this.
            else whole_string_searched = true;
        }
    }

    cout << "\nHere's the silly story:\n\n"; // Announce the silly story is created.
    cout << story << '\n'; // Display the silly story.


    return 0; // End the program.
}