Discussion

What is the value of x in this C code?

void main()
    {
        int x = 4 *5 / 2 + 9;
    }

Answer: C

Correct answer: 19

* and / bind tighter than + and, having equal precedence, associate left to right:

\[ 4 \times 5 = 20, \quad 20 / 2 = 10, \quad 10 + 9 = 19 \]

Every step is integer arithmetic, so the answer is exactly 19.

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