12-1mekdma:
Although the electronic computer is characterized by its ability to carry out calculations according to orders and instructions given to him at high speed and precision, as well as its potential to save large in the vast and various information that is beyond human saved and restored using normal memory. He is unable to be based in a self-resolve any issue no matter how simple, meaning that his work is limited to the completion of the solutions to the issues that are programmed to him properly in line with the scientific foundations correct that invoke upon these solutions.
therefore we will review in this chapter the necessary steps needed to solve problems using Computer-mail, as well as a detailed explanation of the concept of mapping algorithms and workflow processes that constitute a key element of how programming.
12.2 steps to resolve the issue using the computer:
When you solve any question using computer electronic treatment is to follow the steps Npinha briefly as follows:
• Definition and analysis of the matter:
The definition issue is an accurate expression in the application of the issue so that makes it known and understood clearly and without any ambiguity to all persons working within the field of competence, which is subject to him issue.
while analyzing the issue and put the way the solution is harder difficulties and the most difficult steps, and in order to reach a correct solution, the many laws and mathematical methods to resolve the issue must be used and may also need to develop these laws and ways to make it fit the solution often In this step, you must specify: • the nature of the outputs (results) and organize written. • inputs (data or information) and determine the organization of its kind and entered into the electronic computer. • appropriate methods of solution and evaluated in line with how to implement computer-mail and in light of this The best solution is selected. • programming solution in writing: After choosing the ideal solution and a way to determine what is covered each of mathematical relationships, expressed in the form of a sequence of steps and coherent, accurate descriptions lead to a solution Almsalh.o this sequence of steps known algorithm issue
Algorithm of the Problem and can be represented by this algorithm after clarification of all instructions and orders that are meant serialized implemented in every step of the scheme and a descriptive scheme called sequential workflow processes Flowchart using a set of shapes idiomatic Avatar. The word Algorithm derived relative to the Arab world famous Algorithm who laid the foundations of problem-solving in relays. • programming solution using one of the programming languages: The flow diagram is a planning conceptual Assistant easy observation for the programmer, but it does not make sense when the computer mail, so The method of solution actress plot the course of operations should be written in a language the computer understands and that fit with resolving the issue. and follows writing program at the center outside the right and enter the program to the computer and the program output of this step and started one of the languages Avatar or high-end called source program
source program . • translation program source: After the completion of the writing program source code must be entered to the computer to check the authenticity of his writing hand, and then to translate it into machine language by translation software in the absence of errors in the program source. And go through the process of translation in the following stages: 1. Lexical analysis phase
Lexical analysis :
in this stage is matching the vocabulary of the source program and the names and relationships with those allowed in the language and discover any errors in it.
2. Stage of linguistic analysis and grammar analysis Syntax :
At this stage, the process of conducting matching program instructions source with the rules of language used, and the discovery of any errors which, in addition to the process of converting the program source to the instructions and orders symbolic assembly language.
3.mrahlh translate the program into machine language:
At this stage, we get the program Alhdwi object program and by virtue of which can be initiated in the implementation process.
• experience of the program and its implementation:
After getting the program Alhdwi, are tested to make sure his health logically, using a sample of data checksums Test Data If proved true method of solution to match Results emerging from the computer with the results that have been obtained manually, for example, can execute the program on real data.
