Description
1 (40 pts). Download the source code and the test code given for this question, add
your implementations into this source code, and submit the modified source code
back to Ninova.
DO NOT change the arguments in function prototypes or the main body. COMPLETE
the function only according to the requirements below.
Please check the sample test code and run your code against the test code in Calico.
Your solutions will be assessed with different test cases.
Write a function void append(char* a, char* b) that takes two strings and appends
the characters in b into a by putting a blank character in between the two.
The string a can store at most 20 characters. If the function is called with the two
strings (a, b), but there is not enough space left in the first string (a), function should
print “Error” to the console and terminates. If there is enough space in a, function
appends the string b into a, and prints the string a to the console.
2 (60 pts). Download the source code and the test code given for this question, add
your implementations into this source code, and submit the modified source code
back to Ninova.
DO NOT change the messages written in printf functions, or in the test code. DO NOT
change the main program, ADD the functions and other definitions according to the
requirements below.
Please check the sample test code and run your code against the test code in Calico.
Your solutions will be assessed with different test cases.
Assume we keep an array (name: movies) of pointers to structs. The array has a
fixed size of 50, and it is assumed that the user will not try to add more than 50
movies to this array. The struct’s name is Movie. In this Movie struct, there are three
attributes: The title of the movie, how many times it was purchased, and an average
rating for the movie. The array initially has two elements as shown in the source
code.
2.a. Write a function called get_purchases that searches a movie in the array using
its title given by the user. The title search must be case sensitive. If it finds the
movie in the array, it returns the number of times the movie was purchased. If
it does not find the movie in the array, it returns -1.
2.b. Write a function called compute_rating that re-calculates the average rating
of a movie based on the new rating given by the user. The function first searches
for the movie with its title given by the user. If the movie is found, the function adds
the new rating to the movie’s total rating, and re-calculates the average rating of the
movie. The function then updates the rating of the movie. It also increments the
number of purchases for the movie by one.
If the movie is not found, we offer the user to add this new movie with the given
rating. This part is described in 2.c.
2.c. Write a function called add_movie that adds a new movie to the array with its
title and rating given by the user. It also sets the number of purchases to 1.
BLG102E Final, Spring 2019-2020 2
A sample program execution is provided below. Please also check the test code for
alternative scenarios.
Program: “Welcome to the movie database. Enter your request (1 for getting the
purchases of a movie, 2 for updating the rating of a movie, 3 for exit):”
User: 2
Program: “Enter the movie title:”
User: Harry Potter
Program: “Enter the movie rating (out of 5):”
User: 4
Program: “The movie Harry Potter could not be found in the database. Would you
like to add this movie (Y/N)?”
User: Y
Program: “The movie Harry Potter is added to the database with a rating of 4.”
Program: “Enter your request (1 for getting the purchases of a movie, 2 for updating
the rating of a movie, 3 for exit):”
User: 2
Program: “Enter the movie title:”
User: Harry Potter
Program: “Enter the movie rating (out of 5):”
User: 3
Program: “The movie Harry Potter is updated. The number of purchases is 2. The
rating is updated to 3.50.”
Program: “Enter your request (1 for getting the purchases of a movie, 2 for updating
the rating of a movie, 3 for exit):”
User: 1
Program: “Enter the movie title:”
User: Hellboy
Program: “The movie Hellboy could not be found in the database.”
Program: “Enter your request (1 for getting the purchases of a movie, 2 for updating
the rating of a movie, 3 for exit):”
User: 1
Program: “Enter the movie title:”
User: Harry Potter
Program: “The movie Harry Potter has been purchased 2 times.”
Program: “Enter your request (1 for getting the purchases of a movie, 2 for updating
the rating of a movie, 3 for exit):”
User: 3