BEC10102_Lab_01_V1

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FACULTY OF ELECTRICAL AND ELECTRONIC ENGINEERING

COURSE:

COMPUTER PROGRAMMING (LABORATORY)

LABORATORY INSTRUCTION SHEET

Code : BEC 10102

Program : 01 / 02 BEC/BEF/BEH/BEU/BEE

Experiment : 01

Title : Introduction to C++ Programming

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Faculty of Electrical and Electronic Engineering Page 2

Department of Computer Engineering Session 2011/2012

Title: Introduction to C++ Programming Semester II

Lecturers: Mdm. Munirah Ab.Rahman & Dr Afandi Ahmad

Experiment 01: Introduction to C++ Programming

Outcomes:

After completing this experiment, students should be able to:

a) identify suitable steps to overcome any syntax, logic or run-time error;b) propose a solution using any C++ basic programming in solving problems; andc) construct a simple C++ program for the given problem statement.

Equipment(s):

You need the following items to execute this experiment:

a) A personal computer with Microsoft Visual C++b) Operating System: Windows

Introduction to C++ Programming

Program Debugging Tips:

In writing programs, you will come across with some frightening moments when you cannot

run your program successfully and please do not afraid! When you know the difference type

of error, then you are able to handle your fear, detect the error and provide correct code for

it. Mind you that you should regard writing program is just like writing an essay. Any

programming language has its own grammar, specifications and regulations as similar to

what you have known in learning any other spoken language.

There are three kinds of errors in a program as follows:

1) Syntax/compilation/compile-time error it can be detected by a compiler orinterpreter, when the code is processed. Multiple error messages may be generated

for one syntax error. In this case, the first error message is the most relevant for

fixing the error;

2) Run-time error occurs during the execution of a program. For example, dividingan integer by zero is a runtime error. Runtime errors are harder to find than syntax

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errors because they occur only under certain conditions. A runtime error may also

crash the running program and destroy any information about the cause of the error;

and

3) Algorithmic error or logic error which cannot be detected by a compiler orinterpreter. For example, you might, by mistake, have typed in a wrong value or

formula in an equation for calculation. As a result, the output from the program

execution is incorrect or is not what you would expect.

If a program has either a runtime or logic error, the program has a bug. The process of

finding and fixing bugs is called debugging. Debugging is more difficult, especially for a

large program.

Activity One

Instruction:

Follow step-by-step guideline in order to experience on how to construct a simple C++

program using MS Visual C++.

Step-by-step Guideline: Getting Started with MS Visual C++

The following step-by-step is guidance to getting started with C++ programming software,

MS Visual C++. In this experiment, you will construct a simple C++ program using MS

Visual C++ that able to calculate the voltage across a 200 ohm resistor carrying 3 Ampere

using Ohms law.

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Develop a Simple C++ Program to Find a Voltage using Ohms Law

1. Load software Microsoft Visual C++ 6.0. The following window as shown in Fig. 1.1 willbe appeared.

2. Click File menu and select New. Then a dialog as in Fig. 1.2 will be shown.

3. Click Project tab and select Win32 Console Application. This will create an applicationthat runs at the command prompt like DOS.

4. Make sure the option button ofCreate new workspace and the check box ofWin32 arechosen.

5. Then click OKbutton. Win32 Console Application window will appear. Choose an emptyproject. Next click Finish button and finally click OKbutton. You will see a window like in

Fig. 1.3.

Fig. 1.1: Initial Window

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Fig. 1.2: New Window

Fig. 1.3: Initial project environment

6. Step 6 to step 8 are configuration steps to create a file for construct a C++ program.Click File Newto display the dialog box with content ofFiles tab. The window might be

look like Fig. 1.4. Choose C++ Source File. Checked the Add to project checkbox. By

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default, it will select the current project, for this exercise, Lab1 to include the file into

the project. However, use pull down menu to choose other project.

7. Fill in File name: exercise1. The name can be anything reflected to the purpose of theprogram. Ensure the file is saved in the right path and the right directory. This can be

done by selecting the right location on Location.

8. These steps create a project named Lab1. This project has a file named exercise1.cpp.The project and the file are saved in the stated location. Then click OKbutton. Fig. 1.5 is

the result of these steps.

Fig. 1.4: Newdialog box

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Fig. 1.5: Added a source file named exercise1.cpp in the Lab1 project

9. Enter the code in editor window. The result is shown in Fig. 1.6.

Fig. 1.6: C++ code is entered to calculate voltage using Ohms law

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/*

Program Description: Find a voltage across a 200 ohm resistor

carrying 3A current using Ohms Law

*/

#include

using namespace std;

void main()

{

int V, I, R;I=3;

R=200;

V= I * R;

cout

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Fig. 1.8: Zoom in the code of Fig. 1.6

11.The source code can be executed if no error occurs. To execute, click Build Executeexercise1.exe. This action displays output window.

To do

Fig. 1.9 depicted the expected output for this experiment. List any important issues to be

considered throughout this activity.

Fig 1.9: Output window

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Activity Two

Instruction:

Fig. 1.10 shows the source code named distance.cpp. The source code will convert distances

entered by user in miles to kilometers. Write the source code in Microsoft Visual C++ editor

window. Execute the source code and answer the following questions.

/* File name: distance.cpp

File description: Converts distances from miles to kilometers */

#include

#define KMS_PER_MILE 1.609

using namespace std;

int main (void)

{

double kms

cout miles;

kms = KMS_PER_MILES + miles;

cout

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Questions

1) What type of error occurs during compilation?2) What are the changes you should do to achieve successful compilation? Justify for

each modification that you have made.

3) What are the important steps required in debugging?

Assessment

1) Oral examination2) Short report

Documents

BEC10102_Lab_01_V1