Sample Lab Quiz

CPE 101 Sample Lab Quiz                        Student Name:_______________________________

OVERVIEW

This is an individual activity. Do not share your work with others, and do not look at the work others are doing.

You will be writing a C program to perform some simple arithmetic computations. You must construct a working solution on a computer in the lab.
1. The quiz is open-book, closed-note, and closed-web
2. You may NOT use a personal laptop computer.
3. Make sure your code compiles with no warnings on hornet.
4. You are welcome to use jGRASP, but it isn’t required – you may work entirely on hornet.
5. Read through the entire assignment and ask for necessary clarifications immediately.

SUBMISSION REQUIREMENTS

1. Submit ALL pages of this quiz handout with your name.

2. Make sure your program has the following comment block at the top of the file.        /*         * Your Name Here         *         * Lab Quiz 1         *         * CPE101         */

3. Turn in your source files electronically using the following command on hornet:

handin graderjd quiz1 quiz1.c

* Be sure your source compiles and runs correctly on hornet using the specified compiler options (-lm -Wall –pedantic –ansi).
* Double check you electronic submission using the following command:

handin graderjd quiz1 Problem Statement

    At a recent tortoise racing competition, your pet "Speedy" took first place. The judges at the race determined that Speedy's average rate of travel is one foot every ten seconds. Just for fun, you are curious how long it would take Speedy to travel from Cal Poly to Morro Bay (14 miles), to DisneyLand (232 miles), and around the world (24,901 miles). Write a program that allows the user to enter these distances in miles and computes Speedy's travel time for each one.

Assumptions

    Speedy's rate of travel is a constant within the program. The distances entered in miles will be positive whole numbers. The output should be a decimal number in hours, with two decimal places. The program should display an appropriate prompting message, read the user's input from the keyboard, and display the results on the screen with an explanatory remark. No checking is performed to see if the computations overflow the machine's allowable numeric range, and consequently invalid results may occur.

Required Input

1.    Three distances to walk (in miles).

Required Output

1.    Prompts for input:
"Please enter the first distance for Speedy to travel (in miles):"
"Please enter the second distance for Speedy to travel (in miles):"
"Please enter the third distance for Speedy to travel (in miles):"

2.    An explanatory remark: "It would take Speedy _____ hours to travel ______ miles." printed for each result.

3.    The number of hours (decimal number with 2 decimal places).

4.    The travel distance (same value as input).

Needed Constants and Formulas

    Compute travel time ( Distance divided by rate )
        Given: SpeedyRate = 1 ft / 10 sec
            1 hour = 3600 sec
            1 mile = 5280 feet
            and user's input: Distance

        formulas:
        DistInFeet = Distance * 5280
        RateInFeet = 3600 * SpeedyRate
        TravelTime = DistInFeet / RateInFeet

SPECIFICATIONS

1. Obtain from the ~cs101-1 account on hornet a skeleton file named quiz1skeleton.c.
2. Rename the file to quiz1.c.
3. Add the necessary program statements to create a complete program that solves the problem above:
a. Obtains the input data from the user and store it in a variable of type int. You may assume that the user will only enter whole numbers.
b. Write a function named FindTravelTime to perform all arithmetic calculations.
c. Invoke the function as appropriate from the main program to find the travel time for each distance entered.
d. Display the result computed for each input before asking for the subsequent input (see example below).

4. Here is a sample run. The user’s inputs to the program are shown in bold for clarity – your program doesn’t have to do bold text. With the exception of the input data and results, the program must match the prompts and output exactly as shown including, spelling and spacing. (Note that “xxx.xx” below will be replaced with the actual numeric results).

Please enter the first distance for Speedy to travel (in miles): 14 It would take Speedy xxx.xx hours to travel 14 miles. Please enter the second distance for Speedy to travel (in miles): 232 It would take Speedy xxx.xx hours to travel 232 miles. Please enter the third distance for Speedy to travel (in miles): 24901 It would take Speedy xxx.xx hours to travel 24901 miles.
(Please note that when your program is graded, different distances may be provided as input than shown above.) Partial credit will be awarded for compiling, partial functioning programs.   You do not need to provide comments in your code (except the header block).

TEST DATA
Show your manual calculations here for the expected result when the distance is 10 miles. Circle your result.