Lab 1: Designing Functions

Lab 1: Designing Functions

Part A: Getting Started

Course web site:

Reading:

go to Course Reading - go to Design Recipe 1 - leave it open

Lab Notes:

Download Lab1.exe

Extract: get folder Lab1

Find Lab1.mcp - open it

CTRL/F5 - run the project

Evaluate areaOfCircle several times in GUI

Test areaOfCircle and record the results

Save console as .txt - print it: reliable 229

Part B: Writing Code

Writing a program:

Type in the following function:

/* compute the perimeter of a rectangle, given the width and the height */

double perimeter(double height, double width){

return (2 * height + 2 * width);

}

/* test the perimeter function */

void perimeterTests(){

testHeader("Testing the perimeter function");

expected(100.0);

actual (perimeter(20.0, 30.0));

}

Print the source code.

Run the code.

Add more tests.

Try a couple of errors and see the messages:

omit ; after return

type : after return

misspell one of the variable names

omit one of the parentheses

Part C: Using Blackboard

Use the instruction sheet to sign up for Blackboard

Fill out the questionnaire and submit it.

Copy a program in Metrowerks and submit it.

Save all your work on a diskette and clean the hard drive.

Part D: Extras

Explore arithmetic - GUI with text input and eval button - like Interactions window

Design recipe for simple function

Primitive types: int, double, char, boolean

Explore relational and logical operators

Functions with if

Composition of functions