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pragma solidity 0.4.16 contract code - Am receiving the following message:

Could not compile source code

No visibility specified. Defaulting to "public".

function transfer (address, receiver, uint, amount);

^ ----------------^ ,

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    That's not an error. It's a warning. If you want to get rid of the warning, read what it says. If you still need help, please explain what you've tried so far. – user19510 Feb 7 '18 at 21:26
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You have to specify the visibility for your function.

  function transfer public (address, receiver, uint, amount);

For your Info :-

public - all

private - only this contract

internal - only this contract and contracts deriving from it

external - Cannot be accessed internally, only externally.

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