Increment and logical operators precedence [duplicate]

Answer 1

Don't get confused with Precedence and Order of evaluation.

The order of evaluation of logical OR || is left to right.

So if left = true then left || right will never execute right. In your code exactly same happened.

As you know, any non zero value treated as true in C, hence, ++i or -2 is true. So,

 m = ++i || ++j && ++k;
 m = true || bla bla bla; //right not even checked!
 m = true 
 m = 1

And you get the output as expected.