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Scope and lifetime are distinct yet related issues in programming languages. Languages can sometimes make design decisions that cause a conflict...

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1. Scope and lifetime are distinct yet related issues in programming languages. Languages can sometimes make design decisions that cause a conflict between the scope and the lifetime of variables. Java's decision to allow classes to be defined inside a method illustrates this conflict. Consider the following example: class AnonymousInnerClassInMethod { public static void main(String[] args) { int local = 1; Comparable compare = new Comparable () { public int compareTo(Object value) { return (Integer)value - local; } }; System.out.println(compare.compareTo(5)); } } Why does this code fail to compile? What could it be modified so it would compile? Explain the reason behind this failure in terms of scope and lifetime. 2. C++ allows pointers to stack-dynamic variables. Consider the following C++ function: int twice(int x) { int *y; *y = x * 2; return *y; } Will the above function compile in C++? Is it correct? If not, under what circumstances will it fail and how should it be corrected? Consider one other language that has pointers. Does that language have the same problem? Explain.
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1. Scope and lifetime are distinct yet related issues in programming languages. Languages can
sometimes make design decisions that cause a conflict between the scope and the lifetime of
variables....

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