recipes

#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

struct Recipe {
    string name;
    vector<string> ingredients;
    string directions;
};

// Function to read a recipe from a file
Recipe read_recipe(string filename) {
    ifstream file(filename);
    Recipe recipe;
    if (file.is_open()) {
        getline(file, recipe.name);
        string ingredient;
        while (getline(file, ingredient)) {
            recipe.ingredients.push_back(ingredient);
        }
        getline(file, recipe.directions, '\0');
        file.close();
    } else {
        cerr << "Error: could not open file '" << filename << "'\n";
    }
    return recipe;
}

// Function to write a recipe to a file
void write_recipe(string filename, Recipe recipe) {
    ofstream file(filename);
    if (file.is_open()) {
        file << recipe.name << '\n';
        for (string ingredient : recipe.ingredients) {
            file << ingredient << '\n';
        }
        file << recipe.directions;
        file.close();
    } else {
        cerr << "Error: could not open file '" << filename << "'\n";
    }
}

// Function to search for recipes containing a list of ingredients
vector<string> search_recipes(vector<string> ingredients, vector<string> filenames) {
    vector<string> results;
    for (string filename : filenames) {
        Recipe recipe = read_recipe(filename);
        bool found = true;
        for (string ingredient : ingredients) {
            if (find(recipe.ingredients.begin(), recipe.ingredients.end(), ingredient) == recipe.ingredients.end()) {
                found = false;
                break;
            }
        }
        if (found) {
            results.push_back(recipe.name);
        }
    }
    return results;
}

int main() {
    // Read recipe files
    vector<string> filenames = {"recipe1.txt", "recipe2.txt", "recipe3.txt"};
    vector<Recipe> recipes;
    for (string filename : filenames) {
        recipes.push_back(read_recipe(filename));
    }

    // Write new recipe
    Recipe new_recipe;
    new_recipe.name = "Pizza";
    new_recipe.ingredients = {"Dough", "Tomato sauce", "Mozzarella cheese", "Pepperoni"};
    new_recipe.directions = "1. Preheat oven to 425 degrees F.\n2. Roll dough into a circle.\n3. Spread tomato sauce on dough.\n4. Sprinkle cheese and toppings on pizza.\n5. Bake for 10-15 minutes.\n";
    write_recipe("recipe4.txt", new_recipe);

    // Search for recipes containing certain ingredients
    vector<string> ingredients = {"Cheese", "Pepperoni"};
    vector<string> results = search_recipes(ingredients, filenames);
    if (results.empty()) {
        cout << "No recipes found containing " << ingredients[0] << " and " << ingredients[1] << endl;
    } else {
        cout << "Recipes containing " << ingredients[0] << " and " << ingredients[1] << ":\n";
        for (string result : results) {
            cout << "- " << result << endl;
        }
    }

    return 0;
}