C++ Quadratic Probing: You have a file called athletes.txt Jamie, basketball Justine, soccer
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C++ Quadratic Probing: You have a file called athletes.txt
Jamie, basketball
Justine, soccer
Ned, badminton
Shelley, hopscotch
etc...
The file contains 9 athletes.
The user will specify the size of the hash table. Write a function that keeps track of the total number of collisions and searches into the hash table. Each index is assigned
hash_index = i % table_size where "i" is an int in a for loop up to table_size
If the table is full then:
int t = (hash_index + i* i) % table_size;
Display the number of collisions and searches.
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- struct insert_into_hash_table { // Function takes a constant Book as a parameter, inserts that book indexed by // the book's ISBN into a hash table, and returns nothing. void operator()(const Book& book) { ///// /// TO-DO (8) ||||. // Write the lines of code to insert the key (book's ISBN) and value // ("book") pair into "my_hash_table". /// END-TO-DO (8) // } std::unordered_map& my_hash_table; };Phyton: Program 6: Write a program that allows the user to add data from files or by hand. The user may add more data whenever they want. The print also allows the user to display the data and to print the statistics. The data is store in a list. It’s easier if you make the list global so that other functions can access it. You should have the following functions: · add_from_file() – prompts the user for a file and add the data from it. · add_by_hand() – prompts the user to enter data until user type a negative number. · print_stats() – print the stats (min, max, mean, sum). You may use the built-in functions. Handling errors such as whether the input file exist is extra credit. To print a 10-column table, you can use the code below: for i in range(len(data)): print(f"{data[i]:3}", end="") if (i+1)%10==0: print() print() Sample run: Choose an action 1) add data from a file 2) add data by hand 3) print stats 4)…//inserts e at index ind publicvoidadd(intind,Te){ //if index is invalid display a message and return //valid index are 0 to size //push all elements up by one all the down to index ind (stop at index ind) //insert e at index ind //increase the size }
- QUESTION 9 A given file can only be opened once per program -- you cannot close it and open again until after your program terminates. True False QUESTION 10 You need to store a list of players on a team so that you can look them up by number. The numbers are small and unique to each player, and neither the players nor their numbers change often. Should you use an ArrayList or a LinkedList? Linked List ArrayList It doesn't matter in this case.code: public class PasswordGeneratorAndStorage {/*** Adds an application to the applications ArrayList. If index is -1, add application* to the end of applications. Else is index is within the size of applications, add* application at that index in applications. Otherwise, return. However, if applications * or application is null, return.* * @param applications* @param application* @param index*/public static void addApplication(ArrayList<String> applications, String application, int index) {// TODO: FILL IN BODY}/*** Generates a random password of length passwordLength and adds it to the end of* passwords if index is -1, or adds it to the index of passwords if index is within the* size of passwords (similar to how the addApplication adds an application). To generate* the random password, use rand to generate a random int within the size of characters. You* can then use this int to grab the char at that index in characters and concatenate that* to your String password variable.…3. lookup_friends_heights This function takes a friends database (a list of dictionaries, like the previous functions) and a list of friends names, and it returns a list of heights for the specified friends. If a given friend's name is not present in the friends database, we put a None in the corresponding slot. We assume that there will be at most one friend with a given name in the list. You may want to use nested for-loops for this function. Sample calls should look like this. >>> lookup_friends_heights([{"name":"todd","height":170},{"name": "sarah", "height":165},{"name":"dweezil", "height":175}], ["dweezil", "sarah"]) [175, 165] >>> lookup_friends_heights([{"name": "todd","height":170},{"name": "sarah","height":165},{"name": "dweezil", "height":175}], %3D ["sarah", "elíza", "dweezil"]) [165, None, 175]
- 3. lookup_friends_heights This function takes a friends database (a list of dictionaries, like the previous functions) and a list of friends names, and it returns a list of heights for the specified friends. If a given friend's name is not present in the friends database, we put a None in the corresponding slot. We assume that there will be at most one friend with a given name in the list. You may want to use nested for-loops for this function. Sample calls should look like this. >>> lookup_friends_heights([{"name":"todd","height":170},{"name": "sarah","height":165},{"name":"dweezil","height":175}], ["dweezil", "sarah"]) [175, 165] >>> lookup_friends_heights([{"name": "todd","height":170},{"name": "sarah","height":165},{"name": "dweezil", "height":175}], ["sarah", "elíza", "dweezil"]) [165, None, 175]3. lookup_friends_heights This function takes a friends database (a list of dictionaries, like the previous functions) and a list of friends names, and it returns a list of heights for the specified friends. If a given friend's name is not present in the friends database, we put a None in the corresponding slot. We assume that there will be at most one friend with a given name in the list. You may want to use nested for-loops for this function. Sample calls should look like this. >>» lookup_friends_heights([{"name":"todd", "height":170},{"name":"sarah","height":165}, {"name":"dweezil","height":175}], ["dweezil", "sarah"]) [175, 165] >>> lookup_friends_heightsC[{"name":"todd","height":170},{"name":"sarah","height":165}, {"name":"dweezil","height":175}], ["sarah", "eliza", "dweezil"]) [165, None, 175] 4. class definition for Friend For the next version of the friends database (coming soon!), we want to use classes rather than dictionaries. Define a Friend class , where each Friend object…C++ Complete the program that will allow the user to enter data on 10 Halloween costumes. The program will create Costume objects and then store the Costume objects in a Hash Table. The Costume ID will be the key and a pointer to the Costume object will be the value. You are given Lab7.cpp, HashEntry.h, and Costume.h and you should not have to make any changes to these files at all. You will need to write HashTable.h, which implements the HashTable class. This should NOT be a template class. Your HashTable class should resolve collisions by linear probing and should use the HashEntry class for the linkedlist nodes. Because we’re using probing, there is no removal function. This is okay for this application, since we want to keep a record of costumes that are no longer being kept in stock. ---GIVEN--- Lab.cpp #include <iostream> #include "HashTable.h" #include "Costume.h" using namespace std; int main() { int size; int key; Costume *newCostume; string name; float price;…
- JAVA PROGRAM Chapter 7. PC #16. 2D Array Operations with Additional Requirements Write a program that creates an ArrayList of ArrayList of Doubles. The program should ask the user to enter the filename from the keyboard and validate the file for existence. Once the file is verified, the program should load the two-dimensional ArrayList with test data from the file. Be careful, as some of the files will contain rows with different number of elements. The program should work regardless whether the input data is perfectly rectangular or ragged. The program should have the following methods: • main. Main entry point for the program. • getRowSubtotal. This method should accept a two-dimensional ArrayList as its first argument and an integer as its second argument. The second argument should be the index of the row in the ArrayList. The method should return the subtotal of the values in the specified row. • getColSubtotal. This method should accept a two-dimensional ArrayList as…JAVA PROGRAM Chapter 7. PC #16. 2D Array Operations with Additional Requirements Write a program that creates an ArrayList of ArrayList of Doubles. The program should ask the user to enter the filename from the keyboard and validate the file for existence. Once the file is verified, the program should load the two-dimensional ArrayList with test data from the file. Be careful, as some of the files will contain rows with different number of elements. The program should work regardless whether the input data is perfectly rectangular or ragged. The program should have the following methods: • main. Main entry point for the program. • getRowSubtotal. This method should accept a two-dimensional ArrayList as its first argument and an integer as its second argument. The second argument should be the index of the row in the ArrayList. The method should return the subtotal of the values in the specified row. • getColSubtotal. This method should accept a two-dimensional ArrayList as…JAVA PROGRAM Chapter 7. PC #16. 2D Array Operations with Additional Requirements Write a program that creates an ArrayList of ArrayList of Doubles. The program should ask the user to enter the filename from the keyboard and validate the file for existence. Once the file is verified, the program should load the two-dimensional ArrayList with test data from the file. Be careful, as some of the files will contain rows with different number of elements. The program should work regardless whether the input data is perfectly rectangular or ragged. The program should have the following methods: • main. Main entry point for the program. • getRowSubtotal. This method should accept a two-dimensional ArrayList as its first argument and an integer as its second argument. The second argument should be the index of the row in the ArrayList. The method should return the subtotal of the values in the specified row. • getColSubtotal. This method should accept a two-dimensional ArrayList as…