[Ethereum] How to call a function of a deployed contract from another contract

The calling contract does nothing abnormal and it needs no knowledge of the modifier. modifier is just a compiler sweetener that helps roll up repetitive code.

There are useful comments here about correctly designing your modifier to perform its intended function including passing arguments into the modifier. What it does and how it does it is an internal matter; of no concern to contracts that call it.

Hope it helps.

You actually sent a TX that call that method of the first smart contract, that called the function of the second smart contract. The thing is you are on a real blockchain - it seems Ropsten to me - and not in the memory of your computer, so you cannot retrieve values from a contract like that. What remix is returning to you is the transaction receipt after the block is mint.

If you want a ÐApp to be able to retrieve values directly from a contract, create functions with constant returns. And please note soon this constant will be split in view and pure.