Answer to question 15A-1

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Answer to Question 15A-1

The simulation is similar to the one shown for test(3), but it starts with z = 2, causing test(2) to return 32. Here it is.

test

z = 2

at: int k = fourthPower(z);

test

z = 2

at: int k = fourthPower(z);

fourthPower

y = 2

at: int s = sqr(y);

test

z = 2

at: int k = fourthPower(z);

fourthPower

y = 2

at: int s = sqr(y);

sqr

x = 2

at: return x*x;

test

z = 2

at: int k = fourthPower(z);

fourthPower

y = 2

s = 4

at: int r = sqr(s);

test

z = 2

at: int k = fourthPower(z);

fourthPower

y = 2

s = 4

at: int r = sqr(s);

sqr

x = 4

at: return x*x;

test

z = 2

at: int k = fourthPower(z);

fourthPower

y = 2

s = 4

r = 16

at: return r;

test

z = 2

k = 16

at: return 2*k;

Test returns 32, and its frame is destroyed.