By Шевченко В.Е.
ISBN-10: 364202288X
ISBN-13: 9783642022883
ISBN-10: 3642022898
ISBN-13: 9783642022890
В книге в научно-популярной форме изложены основные способы решения логических задач: здравым рассуждением, при помощи исчисления высказываний, составлением таблиц и построением графов.Пособие содержит свыше ста задач для самостоятельного решения, на которые в конце книги приведены ответы и краткие указания.Пособие рассчитано на учащихся физико-математических и средних общеобразовательных школ. Оно может быть использовано учителями математики при проведении внеурочной кружковой работы.
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LDA 2 , 2 1 , 3 . loads accumulator 2 from the store address composed of the contents of accumulator 3 + 21 (octal). LD DP DATA 5. loads accumulator D for memory address DATA 5. Various separators are used. Spaces, commas and full-stops are the most common types of separator between the various components of an assembly language statement. Differences in practice with regard to component separation may confuse a programmer using more than one assembly language. 54 Programming The address part of an assembly language statement may be other than an address or a label.
The latter has several thousand members, holds semi-annual meetings and has a program library which contains over 100 scientific routines and some business data processing software. The relative lack of ap plications software, however, in some areas means that it is essential for some minicomputer users either to buy all their programs from a software house or to employ programmers to produce programs tailored to the specific needs of the organisation. The next chapter will discuss some of the problems in progranuning the minicomputer.
This is an example of the universal pro gramming technique of putting instructions which are often used in a loop where they are obeyed over and over again until some test for a condition (in this case whether the process has been performed 100 times) leads out of the loop. It will be perceived that the above trivial process could easily be altered to print the average of 1000 numbers by the alteration of the one statement in the diamond-shaped box to COUNT < 1000 If it was desired to process, in a similar manner, an amount of numerical input data which varied each time the program was used, as opposed to a fixed number of items such as 100 or 1000, some symbol would have to be recorded at the end of the numerical data which could be tested by the program before it was processed to ascertain if it was a valid numerical data item or the end symbol.