Halstead 复杂度

计算下列代码片段的 Halstead 复杂度的 11 项内容。

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Operator	Number of Occurrences	Operand	Number of Occurrences
If	1	month	3
<	1	year	5
+=	1	dayray	1
-	1	day	1
+	6	3	1
*	2	12	1
/	4	1	1
%	1	26	1
n1 = 8	N1 = 17	10	1
		4	1
		6	1
		100	1
		400	1
		7	1
		n2 = 14	N2 = 20

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• n1 = 8, n2 = 14, N1 = 17, N2 = 20
• Program vocabulary: n = n1 + n2 = 22
• Program length: N = N1 + N2 = 37
• Program volume: V = Nlog2(n) = 164.9978
• Program level: L^ = (2/n1) * (n2/N2) = 0.175
• Program difficulty: D = 1/L^ = 5.7143
• Program Effort: E = V * D = V/L^ = 942.8446
• Language level: Lʹ = L^ \* L^* V = 5.0531
• Program Time(hours): T^ = E/(S * f) = 0.0145
• 平均语句大小: N/语句数 = 9.25
• 程序中的错误数预测值:
• B = V/3000 = Nlog2(n)/3000 = 0.0550

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