软件测试 | assignment4

OperatorNumber of Occurrencesif1<1+=1–1int1+6*2/4ayray1return1n1 = 11N1 = 20 OperandNumber of Occurrencesmonth331121year5day11126110141611001400171n2 = 13N2 = 19

Halstead Metrics

$n_1=11,n_2=13,N_1=20,N_2=19$程序词汇表长度 Program vocabulary: $n=n_1+n_2=24$程序长度或简单长度 Program length: $N=N_1+N_2=39$程序的预测长度 Calculated program length:N^ =$n_{1}lo{g}_2{n}_1+n_{2}lo{g}_2{n}_2=86.15946$程序体积或容量 Program volume: $V=Nlo{g}_2(n)=178.81$程序级别Program level: L^ $=(2/n_1)\ast (n_2/N_2)=2/11\ast 13/19=0.124$程序难度Program difficulty: $D=1/$L^ $=8.03846$编程工作量 Effort: $E=V\ast D=V/$L^ = $1437.357$语言级别: Lʹ = L^ * L^ * V = $2.74938256$编程时间 (hours): T^ = $E/(S\ast f)=E/(60\ast 60\ast 18)=0.02218$平均语句大小: $N/语句数=39/4=9.75$程序中的错误数预测值: $B=V/3000=Nlo{g}_2(n)/3000=0.0596$