Answer:
An error will be occurred here. In C++ a function must be like
returntype function_name(){
}
but the functions in given class does not have returntype given. So there will be a syntax error.
If the returntype is defined then the code does not show any output since nothing is printed in the main function.
Answer:
You didn't give any choice as it looks a multiple choice question
Answer:
Code is in the attached screenshot.
Explanation:
Assumed it was written in Java based on your other question asked.