Solidity4

pragma solidity ^0.4.21;

contract Election{
    struct Canditate{
        string name;
        uint voteCount;
    }
    struct Voter{
        bool authorized;
        bool voted;
        uint vote;
    }
    address public owner;
    string public electionName;
   
    mapping(address => Voter) public Voters;
    Canditate[] public Canditates;
    uint public totalVotes;
   
    modifier ownerOnly(){
        require(msg.sender == owner);
        _;
    }
    function Election(string _name) public {
        owner = msg.sender;
        electionName = _name;
    }
    function getNumberCandidates() public view returns(uint) {
        return Canditates.length;
    }
    function addCandidate(string _name) ownerOnly public {
        Canditates.push(Canditate(_name,0));
    }
    function authorize(address _person) ownerOnly public {
        Voters[_person].authorized = true;
    }
    function vote(uint _voterIndex) public {
        require(!Voters[msg.sender].voted);
        require(Voters[msg.sender].authorized);
       
        Voters[msg.sender].vote = _voterIndex;
        Voters[msg.sender].voted = true;
         Canditates[_voterIndex].voteCount += 1;
         totalVotes += 1;
    }
   
    function end() ownerOnly public {
        selfdestruct(owner);
    }}