System programming Introduction in system programming Artamonov Yevhen

System programming Introduction in system programming Artamonov Yevhen Borisovich

Termins l The program is the data intended for management by concrete components of system of processing of the information with a view of realization of certain algorithm.

Termins l The software is a set of programs and the program documents necessary for their operation.

System software l NECESSITY OF DOCUMENTING. By definition of the program become a software only at presence of the documentation. The end user cannot work, not having the documentation. The documentation makes possible duplicating software and his sale without his developer. On the Brooks a mistake in software is the situation when the program product functions not according to the description, hence, the mistake in the documentation also is a mistake in a program product.

Properties of software l NECESSITY OF DOCUMENTING. l EFFICIENCY. Software is designed on repeated use (for example, the text editor, etc. ) is written and debugged once, and is carried out repeatedly. Thus, it is favourable to transfer expenses for a production of software and to release from expenses a stage of performance, to avoid duplicating expenses.

Properties of software l NECESSITY OF DOCUMENTING. l EFFICIENCY l RELIABILITY. Testing of the program at allowable specifications of the entrance data, Protection against wrong actions of the user, Protection against breaking - users should have an opportunity of interaction with software only through legal interfaces.

Gotie: " Mistakes in system are probable because of failures of the equipment, software mistakes, wrong actions of the user. The first - are inevitable, the second - are probable, the third - are guaranteed".

Properties of software l NECESSITY OF DOCUMENTING. l EFFICIENCY l RELIABILITY. l OPPORTUNITY OF SUPPORT. The probable purposes of support - software adaptation to concrete conditions of application, elimination of mistakes, updating.

Properties of software l NECESSITY OF DOCUMENTING. l EFFICIENCY l RELIABILITY. l OPPORTUNITY OF SUPPORT.

What is it SYSTEM PROGRAMMING ? ? ?

Termins l The system program is the program intended for maintenance of serviceability or increase of efficiency of it use. l The applied program is the program intended for the decision of a task or a class of tasks in a certain scope.

Three categories of software l SYSTEM l INTERMEDIATE l APPLIED

l The managing program is the system program realizing a set of functions of management which includes resource management and interaction with an environment, restoration of work of system after display of malfunctions in means. l The program of service (utility) is the program intended for rendering of services of the general character to users and the attendants.

l The programming system is the system formed by the programming language, the compiler or the interpreter of the programs submitted in this language, the corresponding documentation, and also auxiliary means for preparation of programs for the form, suitable for performance. l The program module is the program or functionally completed fragment of the program intended for storage, translation, association with other program modules and loadings in operative memory.

Coordination of the teacher: 1) auditory 5 -214 2) e-mail: eart@ukr. net 3) skype: eb_art Materials to the course: http: //www. eart. ho. ua/prepad