There's many problems here. What does the compiler tell you? Yes I can fix this for you but I want you to work through it as the errors are very basic ones for almost any language.
Take a look at you if-statements. They are not specifying chars to compare against. It's using actual arithmetic operators. You want characters. When you need an actual single character, you must wrap it in single quotes.
Example:
char c = '2';
This assigns it the character '2'.
char c = 2;
this assigns it the VALUE of 2. Do you see the difference?
Also the operator you are using to do the comparison is incorrect. Fix the code above.