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helloWorld.sol

pragma solidity ^0.5.11;

contract HelloWorld{
    string public message;
    
    function setMessage (string memory newMessage) public {
        message = newMessage;
    }
    
}

voting.sol

pragma solidity ^0.5.11;
pragma experimental ABIEncoderV2;

contract Voter{
    uint[] public votes;
    string[] public options;
    mapping (address => bool) hasVoted;
    
    constructor(string[] memory _options) public{
        options = _options;
        votes.length = options.length;
    }
    
    function vote(uint option) public{
        require(0 <= option && option < options.length, 'Invalid Option');
        require(!hasVoted[msg.sender], 'Account has already voted');

        votes[option] = votes[option] + 1;
        hasVoted[msg.sender] = true;
    }
    
    function getOptions() public view returns (string[] memory){
        return options;
    }
    
    function getVotes() public view returns (uint[] memory){
        return votes;
    }
    
}