What is the output of this code?

Question

There is a error .
plz explain why this error.
https://code.sololearn.com/c1N5WohiaOZ4/?ref=app

Answer 1

//define a 10 in not a valid keyword so you have errors

https://code.sololearn.com/cOG8rwwNgAdb/?ref=app

Answer 2

I think it's because you're defining the same variable multiple times

Answer 3

VEERESH MAURYA You got the error in your code because, when you use #define to set 'a' to 10
it becomes like a constant that you are trying to define again and than change.