软件测试 | assignment4

Operator	Number of Occurrences
if	1
<	1
+=	1
–	1
int	1
+	6
*	2
/	4
%	1
dayray	1
return	1
n1 = 11	N1 = 20

Operand	Number of Occurrences
month	3
3	1
12	1
year	5
day	1
1	1
26	1
10	1
4	1
6	1
100	1
400	1
7	1
n2 = 13	N2 = 19

Halstead Metrics

• $n_1 = 11 , n_2= 13, N_1 = 20, N_2 = 19$n1​=11,n2​=13,N1​=20,N2​=19
• 程序词汇表长度 Program vocabulary: $n = n_1 + n_2 = 24$n=n1​+n2​=24
• 程序长度或简单长度 Program length: $N = N_1 + N_2 = 39$N=N1​+N2​=39
• 程序的预测长度 Calculated program length:N^ =$n_1 log_2n_1+n_2log_2n_2= 86.15946$n1​log2​n1​+n2​log2​n2​=86.15946
• 程序体积或容量 Program volume: $V = Nlog_2(n) = 178.81$V=Nlog2​(n)=178.81
• 程序级别Program level: L^ $= (2/n_1) * (n_2/N_2) = 2/11 * 13/19 = 0.124$=(2/n1​)∗(n2​/N2​)=2/11∗13/19=0.124
• 程序难度Program difficulty: $D = 1/$D=1/L^ $= 8.03846$=8.03846
• 编程工作量 Effort: $E = V * D = V/$E=V∗D=V/L^ = $1437.357$1437.357
• 语言级别: Lʹ = L^ * L^ * V = $2.74938256$2.74938256
• 编程时间 (hours): T^ = $E/(S * f) = E/(60*60*18) = 0.02218$E/(S∗f)=E/(60∗60∗18)=0.02218
• 平均语句大小: $N/语句数 = 39/4 = 9.75$N/语句数=39/4=9.75
• 程序中的错误数预测值: $B = V/3000 = Nlog_2(n)/3000 = 0.0596$B=V/3000=Nlog2​(n)/3000=0.0596