I am getting this error while a contract compilation using online solidity compiler :
 
Untitled:23:19: Error: Member "value" not found or not visible after argument-dependent lookup in string storage pointer - did you forget the "payable" modifier? var amount = msg.value; ^-------^

Contract code is like this :

function transfer(address user) payable { var amount = msg.value; var sender = msg.sender;

What wrong i am doing ?

I am getting this error while a contract compilation using online solidity compiler :
<br/

Untitled:23:19: Error: Member "value" not found or not visible after argument-dependent lookup in string storage pointer - did you forget the "payable" modifier? var amount = msg.value; ^-------^

Contract code is like this :

function transfer(address user) payable {
        var amount = msg.value;
        var sender = msg.sender;

What wrong i am doing ?