COP3223 Assignment #1 Solution

Introduction to C Programming – COP 3223

Objectives
1. To give students practice at typing in, compiling and running simple programs.
2. To learn how to read in input from the user.
3. To learn how to use assignment statements and arithmetic expressions to make calculations

Introduction: Programmers for a Better Tomorrow
Programmers for a Better Tomorrow is an organization dedicated to helping charities, medical societies, and scholarship organizations manage various tasks so that they can focus on making the world a better place! They have asked you and your classmates to help them develop some new programs to benefit their organizations.

Problem: Knitting for Fun and Non-Profit (knit.c)

In this program, you will ask the user how many balls of yarn they have on hand and how many yards of yarn each ball contains. Then, based on the total number of yards the user has, your program can determine how many hats OR sweaters can be made.

It takes 225 yards to make a hat and 450 yards to make a sweater. If the user has 500 total yards, they would be able to make two hats or one sweater. Your program should print this information for the user.

Input Specification
1. The number of balls of yarn the user has, n, where n is an integer greater than zero.
2. The number of yards in each ball, y, where y is an integer greater than zero.

Output Specification
Output the result using the format below:

You can make X hats or Y sweaters.

Output Sample
Below are some sample outputs of running the program. Note that these samples are NOT a comprehensive test. You should test your program with different data than is shown here based on the specifications given above.

In the sample run below, for clarity and ease of reading, the user input is given in italics while the program output is in bold. (Note: When you actually run your program no bold or italics should appear at all. These are simply used in this description for clarity’s sake.)

2
Sample Run #1
How many balls of yarn do you have?
6
How many yards are in each ball of yarn?
100

You can make 2 hats or 1 sweaters.

Sample Run #2
How many balls of yarn do you have?
5
How many yards are in each ball of yarn?
50

You can make 1 hats or 0 sweaters.

Sample Run #3
How many balls of yarn do you have?
3
How many yards are in each ball of yarn?
425

You can make 5 hats or 2 sweaters.


Deliverables
One source files – knit.c – is to be submitted over WebCourses.

Restrictions

Grading Details
Your programs will be graded upon the following criteria:

1) Your correctness

2) Your programming style and use of white space. Even if you have a plan and your program works perfectly, if your programming style is poor or your use of white space is poor, you could get 10% or 15% deducted from your grade.

3) Compatibility – You must submit C source files that can be compiled and executed in a standard C Development Environment. If your program does not compile, you will get a sizable deduction from your grade.