22 lines
448 B
QBasic
22 lines
448 B
QBasic
' This script is an example of MY-BASIC
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' Copyright (c) 2011 - 2014 W. Renxin. All rights reserved.
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' For more information, see https://github.com/paladin-t/my_basic/
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PRINT "Input: "
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INPUT ns$
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n = VAL(ns$)
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x = n * 2 - 1
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a = 1 - 1 / 3
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w = (x - 5) / 2 + 1
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v = 100 / w
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FOR y = 5 TO x STEP 2
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iy = (y - 1) / 4
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iy = FLOOR(iy)
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IF iy = (y - 1) / 4 THEN a = a + 1 / y ELSE a = a - 1 / y
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u = u + v
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NEXT
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a = a * 4
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PRINT "PI = ", a |