8. If a = 5 and b = 4 the value of the expression a +b/2^ + 6 is d )18 b)16 c)17 a)15

Question

Answer plz

Answer 1

The value of the expression in C++ depends on the operator precedence and associativity rules.

In C++, the operator precedence rules state that the exponentiation operator (^) has higher precedence than the division operator (/), which in turn has higher precedence than the addition operator (+).

The associativity rules state that all of these operators are left-associative, meaning that they are evaluated from left to right.

Using these rules, we can evaluate the expression as follows:

a + b / 2^ + 6
= a + (b / (2^)) + 6 // exponentiation is evaluated first
= 5 + (4 / (2^)) + 6 // substitute the given values of a and b
= 5 + (4 / 16) + 6 // evaluate the exponentiation
= 5 + 0.25 + 6 // evaluate the division
= 11.25

However, since both a and b are integers, the division operator / performs integer division, which truncates the result towards zero. This means that 4 / 16 will evaluate to 0, not 0.25. Therefore, the expression simplifies to:

Answer 2

a + b / 2^ + 6
= a + (b / (2^)) + 6 // exponentiation is evaluated first
= 5 + (4 / (2^)) + 6 // substitute the given values of a and b
= 5 + (4 / 16) + 6 // evaluate the exponentiation
= 5 + 0 + 6 // evaluate the division (truncated towards zero)
= 11

Therefore, the value of the expression in C++ when a = 5 and b = 4 is 11. Therefore, the correct option is (c) 17 is not the correct answer for this expression.