Function not accepting parameter

Solidity Programming
#1

I have written following simple solidity code

pragma solidity ^0.4.0;
contract C1 {
function f()
{
g(8) ; // simply passing an integer to another function
}
function g( uint x) returns (uint )
{
uint b = x ;
return b ;
}
}

Now as per my understanding , function g should have taken 8 as parameter . The value should have been x=8 , thereby equating b also to 8 and function g returning 8 .

However , I don’t know why but function g is taking paramter from me i.e. user instead of taking 8 .
Now I know I did not added public/view/pure etc , but I am a newbie in solidity and adding those also did not chaged anything. I tried it and so for simplification I removed it here.

image

Can anyone please tell me what is wrong here ?

#2

Maybe you can have such instead

pragma solidity ^0.4.0;
contract C1 {
  function f() public pure returns(uint){
    return g(8) ; // simply passing an integer to another function
  }
  function g( uint x) private pure returns (uint){
    uint b = x ;
    return b ;
  }
}