Question

Evaluate the following expressions, if the values of the variables are a = 2, b = 3 and c =
9
a+ = a++ – ++b +a
a+= a++ + ++a + – – a + a – – ;
b+= b++ – ++b + a;

Answer 1

Answer:

(a) a - (b++) * (--c);

22

WORKING

   a - (b++) * (--c)

⇒ 2 - 3 * 8       [∵ b++ uses current value of b in expression and then increments it, --c decrements c to 8 and then uses this 8 in the expression]

⇒ 2 - 24

⇒ -22

(b) a * (++b) % c;

8

WORKING

   a * (++b) % c

⇒ 2 * 4 % 9       [∵ ++b increments b to 4 then uses it in the expression]

⇒ 8 % 9

⇒ 8

Answer 2

Answer:

a = 2, b = 3, c = 9

i) 2 += 2 - 4 + 3

3

ii) 2 += 2 + 4 + 3 + 3

14

iii) 3 += 3 - 5 + 2

3

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