Software functional faults This exercise refers to the program computing the average value of a set of numbers, presented in section 5.4.2.

1. Consider the two design faults of lines 5 and 7 shown in Figure 5.13.
Analyze these faults and determine all the input vectors which provoke failures . Compare the seriousness of these failures.
2. A third fault has led to the following pro gram (Figure 5.18). What are the input activation conditions and their relative failures? What extern al consequences could result from these failures?

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function Average (A: in Set) return Element is Sum: Element: 0.0; begin for I in A'range loop Sum: (A(I) + Sum)/2; end loop; return Sum; end Average Figure 5.18. Design faults