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Election.sol

pragma solidity ^0.4.24;

contract Election{
    address private owner;
    
    struct Candidate{
        string name;
        address acc_address;
        uint256 num_of_votes;
    }
    struct Voter{
        string name;
        address acc_address;
        address vote_for;
        uint256 vote;
    }
    struct Acc_addreses{
        address[] candidate_adds;
        address[] voter_adds;
    }
    Acc_addreses private all_acc;
    mapping(address => Candidate) candidates;
    constructor () public {
        owner = msg.sender;
    }
    modifier isOwner() {
        require (owner == msg.sender);
        _;
    }
    modifier isValidVote(uint256 votes) {
        require (votes <= 5);
        _;
    }
    
    
    function addCandidate(string memory _name, address _acc_address) public isOwner {
        Candidate memory candidate;
        candidate.name = _name;
        candidate.acc_address = _acc_address;
        candidate.num_of_votes = 0;
        candidates[_acc_address] = candidate;
        all_acc.candidate_adds.push(_acc_address);
        
    }
    function getAllCandidatesAccounts() public constant returns (address[] memory){
        return all_acc.candidate_adds;
    }
    function getCandidate(address _address) public constant returns (string memory name, uint256  votes, address add){
        return (candidates[_address].name, candidates[_address].num_of_votes, candidates[_address].acc_address);
    }
    function vote(string memory _name, uint256 _vote, address _vote_for) public isValidVote(_vote){
        Voter memory voter;
        voter.name = _name;
        voter.acc_address = msg.sender;
        voter.vote_for = _vote_for;
        voter.vote = _vote;
        all_acc.candidate_adds.push(msg.sender);
        candidates[_vote_for].num_of_votes += _vote;
    }
}