An Introduction to Digital Computing by F. H. George (Auth.)

By F. H. George (Auth.)

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A desk calculator may be said to store numbers, but it normally only does so for a very short time. A computer stores both numbers and instructions, for any length of time. Now, do we have to place both the instructions and the numbers in store before the computer operates?

We use circles for starts and stops, and squares or rectangles for the other steps. Start Add BtoA Add CtoA Subtract D from A Divide A by E Print out A Stop 5(12) C(40) £(15) E (5) and place result of each operation in A. What does the circle mean in a flow diagram? 01/10/11/12 and you read this as "This is card 1, and you add (01) the number on card 11 to the number on card 10 and write the result on card 12". This is fair enough. We think, though, that you would not start with 1. at the beginning and would rather keep the number on the card itself separate from the instruction.

But you might agree that the pause is also a symbol so you really need two symbols at least, for any language. This is really a matter of how you wish to use the word "symbol". ) Go to 32 27 from 25 Remember Morse code is a code which uses dots and dashes, and therefore seems like a binary code. To see what we said to those who answered "Morse code", go to 32. 28 from 24 A programmer is a person who is responsible for setting out the instructions and numbers in their correct sequence, and then allocating addresses to each instruction and each number.

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