Java错误消息。 意外类型，必需变量，发现值

Question

I am doing a debugging exercise for one of my courses. I have found and fixed all but one error in the code. I have to fix this one error:

int input, x; 
if ((input % 2)= 0)  // <- this is the line with the error
    ++input;
else
    --input;

I am getting an error on the input % 2 , it is saying it is looking for a variable not a value

Answer 1

That is because the assignment operator(=) needs a variable to be assigned to the left side of it. If requires a comparison operator to get a Boolean result. You should use == for the same. After you resolve this issue, you would face another issue because you are trying to use a local variable (index) without initialisation.

Answer 2

如果（（input％2）== 0），则应使用== not =比较/检查值

Answer 3

The problem is the equal statement "=". This "=" should be replaced with "==". Here are explained details https://docs.oracle.com/javase/tutorial/java/nutsandbolts/op2.html

int input, x; 
if ((input % 2) == 0)
 ++input;
 else
 --input;