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Short course of lectures
"Programming bases in language of Pascal"
Introduction.
First of all, it is necessary to remind that programming language studying
Represents acquaintance to formal rules of record of algorithms for their subsequent performance by the computer. This formality results from the principles put in the architecture of computers, and rigidity of logic theory. Therefore, try to perceive all strict enough rules as inevitability, to customize itself on serious,
Scrupulous, occasionally difficult operation. However it is not necessary to be afraid, upset
And to complain about destiny: it is a little accuracy, attention, knowledge of the previous material - and you already the programmer.
The main concepts.
As well as any algorithm which is as you remember, sequence
Instructions, the program in language of Pascal consists of the commands (operators) written in a certain order and a format.
Commands allow to receive, save and handle the data of various types (for example, integers, characters, strings of characters, etc.). However except
Commands so-called "syntactic words" participate in program record still. It also is formality units, ? program structure. Them not
So it is a lot of, but their value is difficult for overestimating. Syntactic words it is possible
To use only on the direct assignment. To reassign them it is not authorized.
You already know that a computer basic purpose - to facilitate to the person operation with great volumes of the information, therefore the overwhelming majority of programs is constructed on one, simple enough principle: data acquisition from an external world (input), their processing on appropriate algorithm, storage of the necessary information and output in external (under the ratio
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