c programming

Basic ideas about C

What to do with a compiler. What can go wrong.

Using a compiler language is not the same as using an interpreted language like BASIC or a GNU shell. It differs in a number of ways. To begin with, a C program has to be created in two stages:

• Firstly, the program is written in the form of a number of text files using a screen editor. This form of the program is called the source program. It is not possible to execute this file directly.
• Secondly, the completed source file is passed to a compiler--a program which generates a new file containing a machine code translation of the source text. This file is called an object file or executable file. The executable file is said to have been compiled from the source text.

Compiler languages do not usually contain their own editor, nor do they have words like RUN with which to execute a finished program. You use a screen editor to create the words of a program (program text) and run the final program in its compiled form usually by simply typing the name of the executable file.

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