Order of precedence

Question

int main()
int x = 5;
int y = 2;
int z = x - y * 2;
Cout << z;

Now it should be 1 but while I was solving an MCQ it gave me answer of -1.
Is my mathematics that much weak?

Answer 1

RAJIV KUMAR KULIYA ,

let's check:-
the expression `x - y * 2` is evaluated according to the operator precedence rules.
The multiplication operator `*` has higher precedence than the subtraction operator `-`.

So, the expression is `x - (y * 2)`
`5-(2*2)`

First: `y * 2`= 2*2which gives 4.

Second: `x - (y * 2)` =5 - 4 which gives 1.

Therefore,
the answer should be 1, not -1.

Conclusion:-
Your mathematics skills are not weak!
It seems like there might be an error in the MCQ or in the way it was solved.

Answer 2

No, you're mathematics aren't that weak. The MCQ is wrong. We're supposed to do the multiplication one first, then subtraction in the following code.