24.1 LAMP Overview
24.1.1 Needs for Database and Web
Until now, all we could do was to run command on Terminal screen to check the result, or run a specific application program and do limited work by using function provided by the program. But this level of functionality alone can not meet all of the requirements we need, so a number of additional features are required.
Chapter 24 Utilizing Database and Web
Chapter’s Main Topics
This Chapter describes database used to systematically store and analyze a lot of data, and discuss how to communicate with other people on the Internet in various dynamic ways using HTML, script language.
It includes descriptions on the following topics:
■ LAMP Overview
■ MySQL Database
■ Apache web server
■ PHP web script language
23.7.3 Writing and Running Program
23.7.3.1 Writing Program Source Code
A typical Java program usually has the following form. Class is defined in the first line of program, and “main” function corresponds to the body of program.
23.7.2 Checking the Current version
Use the following “java” command to confirm whether Java is installed and installed version on Raspberry Pi system.
23.7 Java language
23.7.1 Overview
Java language is a program development language developed by Oracle and is one of the most widely used development languages in the world today. Raspberry Pi also allows you to develop programs with Java language, and now you can use “1.8.0” version.
23.6.3 Saving, Compiling and Running Program
● Saving program
The created program is saved as a file. A source program written in C is stored in a file with extension of “.c”. We will store the program to “~/program_test /test_inout.c” file. Now, if you check the folder contents where the file is located, it will show the results as follows.
23.6.2 Writing Program
A typical C program usually has the following format. Header file is specified in the first line of the program. And “main” function corresponds to the body of the program.
23.6 C language
23.6.1 Overview
C language has a command structure that is easy for a computer machine to understand, and provides powerful performance. C language is a well portable program development language so that programs developed in C language can be used on all computers.
23.5.6 Learning Python Using Simple Example
● Number-matching game example
This program is an interactive, number-matching game. It allows users to match number from 1 to 99.
Here “randint” function is used to get a random number. This program will continue to run using “while” loop until the user match the number.
23.5.5 Learning Python through Game
Raspberry Pi system offers a variety of games by default. Providing games in Raspberry Pi system has another purpose for users as well as for user to enjoy games simply with Raspberry Pi system.
Providing games on Raspberry Pi system has purpose for providing a way to develop the ability to write Python programs through games. To do this, for each game, the system provide an environment that users can interact with games by Python, and users can freely edit program source code for games and execute them.