What is the output of this code and why?

Question

int main()
{
int x=1,y=1,z=1;
cout<<(++x||++y&&++z);
cout<<x<<y<<z;
}

Answer 1

It's called Short Circuit Evaluation and is a common way of optimization used by many compilers. It means essentially the compiler will only evaluate what he needs to know in order to know the result of a statement.
Some reference links:
https://riptutorial.com/cplusplus/example/30129/logical----and----operators--short-circuit

https://en.m.wikipedia.org/wiki/Short-circuit_evaluation

https://softwareengineering.stackexchange.com/questions/325009/short-circuit-evaluation-is-c

Answer 2

I know the output it's 1211. I am unable to understand how it came.

Answer 3

Thanks shadow. It was helpful

Answer 4

me russian