Weird post/pre increment equation
Why does this equation output a 5?
doesnt differ if i cout it directly or put it as a variable it always outputs 5.
I expect it to output, a 1 ?
|
|
doesnt differ if i cout it directly or put it as a variable it always outputs 5.
I expect it to output, a 1 ?
Last edited on
| I expect it to output... |
Your assumption is that that the side effects occur in a well-defined order (left-to-right). They don't. That statement causes undefined behavior.
| Except where noted, evaluations of operands of individual operators and of subexpressions of individual expressions are unsequenced. [...] If a side effect on a memory location is unsequenced relative to either another side effect on the same memory location or a value computation using the value of any object in the same memory location, and they are not potentially concurrent, the behavior is undefined. |
Last edited on
Topic archived. No new replies allowed.