C operators.

[JOZZY& Wakko]

I am reading a book here that claims that there is no order of execution between * and / because they are on the same level. Is this true and does C calculate from left to right first the first class operators and then the second class operators?

At school we used to learn it differently and the book claims it should be the same as at school so it kind of confuses me.

[brewbuck]

I am reading a book here that claims that there is no order of execution between * and / because they are on the same level. Is this true and does C calculate from left to right first the first class operators and then the second class operators?

At school we used to learn it differently and the book claims it should be the same as at school so it kind of confuses me.

Operators of equal precedence execute in an order defined by their associativity. * and / both associate left-to-right, so the leftmost operator conceptually executes first.

I say conceptually, because if the compiler is able to prove that some other order would produce an equivalent result, it is allowed to reorder the operations. But the result will always be the same as if the operators executed in the defined order.