Lecture-02.3.doc

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Department
Electrical Engineering and Computer Science
Course Code
EECS 1540
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all

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CSE 1540.03 Week 2.3 September 16, 2011 Arithmetic Expressions in Fortran - Convert two-dimensional mathematical notation to one-dimensional computer notation Assignment Statement Example: variable = expression 2 − b + b − 4ac 2a Examples: becomes: i = 1 the two most common (-b + sqrt(b*b – 4*a*c))/(2*a) i = i + 1 assignment statements c = 5*(f-32)/9 Built-in Functions (see Appendix 3 of textbook) x = 2.5 Elementary Math y = sin(x) + 3.14159 sqrt(x) square root () z = x / 10 x exp(x) exponential e ) n = m / 10 gives quotient from integer long division abs(x) absolute value alog(x) natural logarithm (base, ln) Worries: alog10(x) base 10 log - unassigned variables Trigonometric Functions - type conversion (on assignment) sin(x) sine of angle x in radians cos(x) cosine of angle x in radians x = i (real← integer) O.K. i = x (integer real) loses fraction part atan(x) arctangent of angle x in radians asin(x) arcsine of angle x in radians … CSE 1540 Week 2.3 – September 16, 2011 page 1 of 2 sinh(x) hyperbolic sine
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