mirror of
https://github.com/inexorabletash/jsbasic.git
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95 lines
2.6 KiB
Plaintext
95 lines
2.6 KiB
Plaintext
101 count = 0
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105 for i = 0 to 20
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106 print
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107 next i
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110 Dim x2(7),sign(7), dx(7)
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120 Rem Init some vars
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125 aminerr=1000
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130 rem res = 8.5e-17
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132 res = 1e-4
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200 xpi=3.14159265358979323846
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250 rem 8 coefs here
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255 Rem elementary charge (e)-0
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260 x2(0)=1.60217662e-19
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265 Rem Planck's constant (h)-1
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300 x2(1)=6.62607004e-34
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350 rem eletron mass (Me)-2
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400 x2(2)=9.109383560899034e-31
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450 Rem Proton radius (Rp)-3
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500 x2(3)=8.41235640479985e-16
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550 Rem Rydberg Constant (R_H or R_{\infty})-4
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600 x2(4)=10973731.5685083
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610 Rem Permittivity of free space (e0)-5
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620 x2(5)=8.854187817e-12
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701 Rem Speed of Light (c)-6
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702 x2(6)=299792458.0
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703 Rem Proton mass (Mp)-7
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704 x2(7)=1.672621898209999e-27
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710 For i = 0 to 6
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720 sign(i)=0
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730 dx(i) = 0.01*res*(x2(i))
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740 next i
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750 Rem define bit to be twiddled here
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755 sign(0)=1
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760 sign(1)=1
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770 sign(2)=1
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780 sign(3)=1
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790 sign(4)=1
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795 sign(5)=1
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797 sign(6)=1
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1000 rem starting error
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1010 xerr1=x2(2)*x2(0)^4/(8*x2(6)*x2(5)^2*x2(1)^3*x2(4))
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1015 yerr2=-xpi*x2(3)*x2(6)*x2(2)/(2*x2(1))
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1017 err = xerr1 + yerr2 - 1.0
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1020 digits=int(-log(abs(yerr+0.00001))/log(10)+0.5)
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1030 Print "Starting err is: ";err
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1032 Print "Starting xerr1 is: ";xerr1
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1034 Print "Starting yerr2 is: ";yerr2
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1040 print "Digits resolution ";digits
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1050 print "aminerr error is: ";aminerr
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1060 for i = 0 to 6
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1061 print "i= ";i, x2(i)
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1062 next i
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1100 print "pi= ";xpi
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1111 rem end
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2000 Rem Main Loop
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2010 For i = 0 to 6
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2020 x2(i)=x2(i)+sign(i)*dx(i)
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2030 xerr1=x2(2)*x2(0)^4/(8*x2(6)*x2(5)^2*x2(1)^3*x2(4))
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2032 yerr2=-xpi*x2(3)*x2(6)*x2(2)/(2*x2(1))-1.0
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2034 err=abs(xerr1+yerr2)
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2035 if err>aminerr then sign(i)=-1*sign(i)
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2037 if err<aminerr then aminerr = err
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2040 next i
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2050 if err < 1.5*res then goto 5000
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2055 print "Working ";err
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2058 count = count+1
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2060 goto 2000
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5000 Rem
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5001 xresstop=2e-15
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5002 if res > xresstop then res = res/10.0
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5010 For i = 0 to 6
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5030 dx(i) = 0.01*res*(x2(i))
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5040 next i
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5100 if res > xresstop then goto 2000
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5106 Print "Done."
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5107 print "Coef "
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5109 for i = 0 to 7
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5110 print x2(i);" "
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5120 next i
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6000 rem Final error
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6010 xerr1=(x2(2)*x2(0)^4)/(8*x2(6)*x2(5)^2*x2(1)^3*x2(4))
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6012 yerr2=-xpi*x2(3)*x2(6)*x2(2)/(2*x2(1)) - 1.0
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6014 err=abs(xerr1+yerr2)
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6020 digits=int(-log(abs(err+1e-16))/log(10)+0.5)
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6030 Print "Starting err is: ";err
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6040 print "Digits resolution ";digits
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6050 print "Final error is: ";aminerr
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6060 print "Iterations= ";count
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6070 print xpi;" <-ideal"
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6080 print xpi+err;" <-calc'd
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6085 print "Calc'd proton mass= ";2*x2(1)/(xpi*x2(3)*x2(6))
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6087 print "Input proton mass= ";x2(7)
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6090 print "Proton/electron mass ratio=";x2(7)/x2(2)
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6100 end
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