Eoi
In closing we might remind you that all of the peripherals from the Hewlett-Packard company are available to you over the IEEE bus. The same also applies to the Commodore PET line of peripherals disk drives, printers, etc. . 10.1 Heat transmission through a multi-layer plate The program calculates the loss of heat through a one or more layer plate and the layer border temperatures Even a window is such a plate. A simple window is a single-layer glass plate an isolation glass window is usually a...
52 The Romberg differentiation Difference quotients
For the differentiation of a function F x , one calculates the difference quotients of F for intervals of length 2H J. The lengths are calculated iteratively with The difference quotients now have the form The derivative of the function F is calculated with the help of these numbers D 0,J at the point XO D K,J 22K D K-1,J 1 - D K-1,J 2 2K-1 3 This procedure is executed until one has gone under a previously chosen margin of error E 6 REM ID DIM X 30 ,Y 30 ,D 30,30 ,H1 30 ,C 30 100 POKE 53280,0...
10500 Rem
IIOOO REM HOOl REM PRINTER OUTPUT 11002 REM 11110 OPEN1,4 PRINT 1,CHR 14 ISOCONJUGATED MODEL NA C HR 10 11115 PRINT 1,MOLECULE NR. Y CHR 15 PRINT 1 PRINT 1, QZ 11130 PX AD I sGOSUB 20000 PRINT 1,PX 11140 NEXT I PRINT 1 PRINT 1 11200 PRINT 1,HUECKEL-COEFFICIENTS 11210 FOR 1 1 TO N PRINT 1, 11220 FOR J 1 TO N 11230 PX U I,J GOSUB 20000 PRINT 1,PX 11240 NEXT J PRINT 1 NEXT I 11250 PRINT 1 PRINT 1,TOTAL- -ELECTRON ENERGY 11260 GE 0 F0RJ 1 TO M GE GE AD J NEXT GE 2 GE PX GE GOS UB20000 PRINT 1,PX...
A 1
The comparison operators serve as decision criteria in programs, to stop a program upon the occurence of certain conditions, for example. The uses are clear so that we will not dwell on them here. We should warn our readers once again about the limited accuracy of the numbers in Commodore BASIC. It can happen that many number pairs never appear to be equal, although this is the case for all practical purposes. For example, .999999994 and 1 are not identical to the computer indeed, they are not...