软件测试Assignment 4

题目要求

1. 计算下列代码片段的 Halstead 复杂度的11项内容：

if (month < 3) {
month += 12;
–year;
}
return dayray((int)(day + (month + 1) * 26/10 + year +
year/4 + 6 * (year/100) + year/400)% 7);

答案

Operator	Number of Occurrences	Operand	Number of Occurrences
if	1	month	3
<	1	3	1
+=	1	12	1
-	1	year	5
return	1	day	1
dayray	1	1	1
int	1	26	1
+	6	10	1
*	2	4	1
/	4	6	1
%	1	100	1
		400	1
		7	1
$n_1=11$	$N_1=20$	$n_2=13$	$N_2=19$

1. Halstead 程序词汇表长度 Program vocabulary: $n=n_1+n_2$ = 24
2. Halstead 程序长度或简单长度 Program length: $N=N_1+N_2$ = 39
3. 以 N^ 表示程序的预测长度 Calculated program length: $\hat{N}=n_{1}lo{g}_2{n}_1+n_{2}lo{g}_2{n}_2$ = 86.159464
4. 程序体积或容量 Volume: $V=Nlo{g}_2(n)$ = 178.813538
5. 程序级别 Level: $\hat{L}=\frac{2}{n_1}\ast \frac{n_2}{N_2}$ = 0.124402
6. 程序难度 Difficulty: $D=\frac{1}{\hat{L}}$ = 8.038462
7. 编程工作量 Effort: E = V * D = V/L^ = 1437.385744
8. 语言级别: $L^{{}^{\prime }}=\hat{L}\ast \hat{L}\ast V$ = 2.767289
9. 编程时间 (hours): $\hat{T}=\frac{E}{S\ast f}$ = 0.022182
10. 平均语句大小: $\frac{N}{语句数}$ = 9.75
11. 程序中的错误数预测值: $B=\frac{V}{3000}=\frac{Nlo{g}_2(n)}{3000}$ = 0.059605