Visual Programming (CBVP2103) This course is worth 3 credit hours Will be covered in weeks Total 13 topics Assessment

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1 CBVP2103

2 Visual Programming (CBVP2103) This course is worth 3 credit hours Will be covered in weeks Total 13 topics Assessment Assignment 30% (submit by 8 th week) Final Exam 65% Class Participation 5% (not free)

3 What is a computer? A machine that manipulates data based on the instructions it receives. Who instructs computers? Who instructs computers? Humans Can another computer instruct a computer? Humans need to determine the tasks for the computer to accomplish. How do we instruct computers? By programming

4 Programming is the process of planning, tabling or the implementation of a task or event or command. In the computing field, programming is instructing a computer to perform specific tasks as instructed. Computer programming can be defined as the process of planning a set of sequence commands to be executed by a computer. Computer programs on the other hand can be defined as a set of sequence commands that have been determined to be executed by a computer.

5 Problem identification is the first step in the programming process. Programming problems are problems that can be solved by using programming languages. For example: What is the sum of =? What is the sum of 100!+20!+16!+2!+89!+46!+31!+465!+54!+78!+3!=? 16! 2! 465! 54! 3!

6 Manual problem solving involves the use of pen and paper or other means. There are many different ways to add the following numbers 10, 3, 4, 56, 120, 21, 39, 1, 13 and 34. Pease write down your answers on a paper. Some may need acalculator l to do it! What is the difference between a calculator and a computer? More advanced Better data storage

7 Solutions can be obtained manually or through programming. In programming, the communication between user and computer is established through commands keyed into a computer s readable format. These instructions are defined by the programmer in the form of a programming language. The main task of a programmer is to devise solutions through the programming language, thus enabling the computers to execute the commands given by users. The requirement for the program will be given by the user to the programmers.

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9 There are two phases involved in the programming process. The first phase is to understand the problem. The second phase is implementation. The two phases are closely interconnected. The first phase of understanding the problem consists of three steps asfollows: a) Analysis i. It is important to identify and understand the problem correctly. ii. For example, if the problem is to add 10 numbers of different numeric values, then the programmer must identify the types of input, the appropriate processing method and the required output design.

10 a) Algorithms i. It represents the programming development process. ii. It traces any logical errors that exist. iii. It uses pseudo code or flow chart. b) Testing i. Test the algorithms by entering a few appropriate data. ii. Trace each sequence processed. iii. Ensure each sequence is in correct order.

11 The second phase, the implementation phase comprises of three steps, which h are as follows: a) Program i. Code writing using the appropriate programming language. ii. Program coded based on tested algorithms. iii. All program syntax must be followed. b) Debugging i. Ensure the programs are fully functional. ii. Various methods of testing procedures need to be taken, such as high volume of data input, out of range input and other functions involved.

12 c) Maintenance i. Final phase for programs to be updated d and documented. ii. Modifying the programs from time to time. The problem solving process is the most important part in all types of programming.

13 Q1. Try to give your own definition of the word computer. Write it down. Then, compare your definition with those in computer books. Q2. Describe in your own words the functions of a computer. Q3. What is the difference between computer Q3. What is the difference between computer programming and a computer program. Find the answer from other computer books.