Campbell CR5000, Руководство оператора

Страница: 205 / 238

Section 8. Processing and Math Instructions
8-33
The XOR operator also performs a bit-wise comparison of identically
positioned bits in two numeric expressions and sets the corresponding bit in
result according to the following truth table:
If bit in expr1 is And bit in expr2 is The result is
0 0 0
0 1 1
1 0 1
1 1 0
XOR Operator Example
The example sets the variable Msg based on the value of variables A, B, and C,
assuming that no variable is a Null. If A = 10, B = 8, and C = 11, the left
expression is True and the right expression is False. Because only one
comparison expression is True, the XOR expression evaluates True.
Dim A, B, C 'Declare variables.
A = 10: B = 8: C = 11 'Assign values.
If A > B XOR B > C Then 'Evaluate expressions.
Msg = True
Else
Msg = False.
End If
Derived Math Functions
The following is a list of nonintrinsic mathematical functions that can be
derived from the intrinsic math functions provided with CRBasic:
Function CRBasic equivalent
Secant Sec = 1 / Cos(X)
Cosecant Cosec = 1 / Sin(X)
Cotangent Cotan = 1 / Tan(X)
Inverse Secant Arcsec = Atn(X / Sqr(X * X - 1)) + Sgn(Sgn(X) -1) *
1.5708
Inverse Cosecant
Arccosec = Atn(X/Sqr(X * X - 1)) + (Sgn(X) - 1) * 1.5708
Inverse Cotangent Arccotan = Atn(X) + 1.5708
Hyperbolic Secant HSec = 2 / (Exp(X) + Exp(-X))
Hyperbolic Cosecant HCosec = 2 / (Exp(X) - Exp(-X))
Hyperbolic Cotangent HCotan = (Exp(X) + Exp(-X)) / (Exp(X) - Exp(-X))
Inverse Hyperbolic Sine HArcsin = Log(X + Sqr(X * X + 1))
Inverse Hyperbolic Cosine HArccos = Log(X + Sqr(X * X - 1))
Inverse Hyperbolic Tangent HArctan = Log((1 + X) / (1 - X)) / 2
Inverse Hyperbolic Secant HArcsec = Log((Sqr(-X * X + 1) + 1) / X)
Inverse Hyperbolic Cosecant HArccosec = Log((Sgn(X) * Sqr(X * X + 1) +1) / X)
Inverse Hyperbolic Cotangent HArccotan = Log((X + 1) / (X - 1)) / 2
Logarithm
LogN = Log(X) / Log(N)