Is there another code instead of codes ( if and switch...case) and do the same operation of if and switch?

Answer 1

There is the Ternary Operator, that serves as shorthand for a single if/else.
It works like this:
condition ? codeIfTrue : codeIfFalse

Which is the same as:
if(condition)
codeIfTrue
else
codeIfFalse

Here's an example:
cout << num % 2 == 0 : "Even" : "Odd" << endl;

Answer 2

no

Answer 3

n0