Question

(b) Evaluate the following C++ expressions and show in the boxes under the operators the of evaluation of the corresponding operations. [2.5 points each): Expression Value 7 / 2 != 6 / 2 && 9 <3 * 7 2 + 3 + 4 / 2 6 + 8% 3 abs (4 7) + 3 / 2 * pow (5.0,2)

Answer 1

Ans:

Expression	Value
7 / 2 != 6 / 2 && 9 < 3 * 7	0
2 * 3 + 4 / 2 - 6 + 8 % 3	4
abs(4-7) + 3 / 2 * pow(5.0,2)	28

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Here the Operator Precedence are: * then / then != then < then && resulted to the value 0

(7 / 2 != 6 / 2 && 9 < 3 * 7)

3 * 7 = 21

6 / 2 = 3

7 / 2 = 3

(3 != 3 && 9 < 21) -------------> 3!=3 returns False which is 0 and 9 < 21 returns True which is 1

(0 && 1) = 0

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(2 * 3 + 4 / 2 - 6 + 8 % 3)

Here the Operator Precedence are: * then / then % then + then - which resulted to the value 4

2 * 3 = 6

4 / 2 = 2

8 % 3 = 2

(6 + 2 - 6 + 2) = 4

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abs(4-7) + 3 / 2 * pow(5.0,2)

Here the Operator Precedence are: ( ) has the highest presidence, which is abs() and pow() then / then * then + then - which resulted the value 28

(abs(4-7) + ((3 / 2) * pow(5.0,2)))

abs(4 -7) = 3

pow(5.0,2) = 25

(3 / 2) = 1

1 * 25 = 25

3 +25 = 28