39 lines
1.0 KiB
Plaintext
39 lines
1.0 KiB
Plaintext
include c:\cxpl\codes; \intrinsic 'code' declarations
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proc Euler(Step); \Display cooling temperatures using Euler's method
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int Step;
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int Time; real Temp;
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[Text(0, "Step "); IntOut(0, Step); Text(0, " ");
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Time:= 0; Temp:= 100.0;
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repeat if rem(Time/10) = 0 then RlOut(0, Temp);
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Temp:= Temp + float(Step) * (-0.07*(Temp-20.0));
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Time:= Time + Step;
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until Time > 100;
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CrLf(0);
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];
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real Time, Temp;
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[Format(6,0); \display time heading
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Text(0, "Time ");
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Time:= 0.0;
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while Time <= 100.1 do \(.1 avoids possible rounding error)
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[RlOut(0, Time);
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Time:= Time + 10.0;
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];
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CrLf(0);
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Format(3,2); \display cooling temps using differential eqn.
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Text(0, "Dif eq "); \ dTemp(time)/dtime = -k*Temp
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Time:= 0.0;
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while Time <= 100.1 do
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[Temp:= 20.0 + (100.0-20.0) * Exp(-0.07*Time);
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RlOut(0, Temp);
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Time:= Time + 10.0;
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];
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CrLf(0);
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Euler(2); \display cooling temps for various time steps
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Euler(5);
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Euler(10);
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]
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