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Would you like to inspect the original subtitles? These are the user uploaded subtitles that are being translated: 1 00:00:07,190 --> 00:00:11,330 In this lecture, we will learn the five steps to programming systems and applications. 2 00:00:11,810 --> 00:00:15,110 The five step process, the programming is defining the problem. 3 00:00:15,230 --> 00:00:16,430 Designing a solution. 4 00:00:16,840 --> 00:00:21,080 Coding the program, testing the program and documenting the program. 5 00:00:21,500 --> 00:00:23,330 Step one is to define the problem. 6 00:00:23,750 --> 00:00:30,260 Defining the problem means fully understanding the objective prospective users, stakeholders, inputs 7 00:00:30,320 --> 00:00:31,160 and outputs. 8 00:00:31,700 --> 00:00:36,950 This step is crucial because if you don't understand the problem, you won't have an easy time writing 9 00:00:36,950 --> 00:00:37,880 the code to solve it. 10 00:00:38,510 --> 00:00:40,400 Step two is to design a solution. 11 00:00:41,090 --> 00:00:45,260 With this approach, it is best to break the main problem down into sub problems. 12 00:00:45,770 --> 00:00:50,600 When you break down programs into modular forms like this, it is called structured programming. 13 00:00:51,080 --> 00:00:56,450 You can create a chart and also write pseudocode to plan out the flow of execution and the logic for 14 00:00:56,450 --> 00:00:57,140 your program. 15 00:00:57,560 --> 00:01:03,050 Recall from a previous lecture that pseudocode is programming logic written out in plain English that 16 00:01:03,050 --> 00:01:06,580 helps developers plan out their solution before they actually start coding. 17 00:01:07,220 --> 00:01:12,260 Step three is to code the program according to the needs of the application or system you are going 18 00:01:12,260 --> 00:01:12,980 to program. 19 00:01:13,340 --> 00:01:15,830 You need to select an appropriate programming language. 20 00:01:16,280 --> 00:01:18,290 Then you need to write the code for the program. 21 00:01:18,710 --> 00:01:20,570 Step force to test the program. 22 00:01:21,050 --> 00:01:26,810 This step is crucial as you want to detect and fix as many bugs in the program as you can before it 23 00:01:26,810 --> 00:01:28,040 reaches the end user. 24 00:01:28,400 --> 00:01:33,560 Before you actually run the program, you should proofread it when you proofread code before running 25 00:01:33,560 --> 00:01:33,710 it. 26 00:01:34,130 --> 00:01:36,260 This is known as desk checking the program. 27 00:01:36,710 --> 00:01:41,870 Debugging the program will involve finding, fixing and removing the average in your program. 28 00:01:42,200 --> 00:01:46,970 There are two main types of errors in programming syntax errors and logic errors. 29 00:01:47,330 --> 00:01:52,790 Syntax errors mean that you did not adhere to the syntactical rules of the language, for example, 30 00:01:53,120 --> 00:01:56,190 placing the curly brace in an incorrect part of the program. 31 00:01:56,930 --> 00:02:00,660 Logic errors mean that the code runs and is free of syntax errors. 32 00:02:01,070 --> 00:02:04,130 But the program does not work in the way that you intended it to. 33 00:02:04,790 --> 00:02:08,720 There is a flaw in your programming logic, the way that your code works. 34 00:02:09,260 --> 00:02:12,350 Remember, it is best to test early and test often. 35 00:02:13,040 --> 00:02:19,250 Step five is to document and maintain the programmer system, creating the documentation on an application 36 00:02:19,400 --> 00:02:19,970 or system. 37 00:02:19,970 --> 00:02:24,620 You program involves writing a description of what the program is and how to use it. 38 00:02:25,160 --> 00:02:30,740 Maintaining the program involves fixing errors that are discovered and upgrading the system as appropriate 39 00:02:31,280 --> 00:02:32,330 in the next lecture. 40 00:02:32,780 --> 00:02:34,910 We will learn how to get the most out of this course. 4022

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