Your compiler isn’t smart enough to take into account that the only two options for side are left and right, so it thinks it’s possible for neither return statement to be executed. When side is neither left nor right, your function doesn’t say which value to return.
If you call the function with a first argument of 0 the loop is never executed and the return statement is, thus, never reached. Falling of the end of a non-void function is undefined behavior. My personal guess is that the return statement was meant to one level up, i.e., in the out block: this would guarantee that the function always returns … Read more
You are getting this error because if your for loop breaks due to breaking condition i < n; then it don’t find any return statement after for loop (see the below, I mentioned in code as comment). If for loop break due to i >= n then control comes to the position where I commented and there is no return statement present. Hence you are getting an error “reach … Read more