Voting

Voting.sol

pragma solidity ^0.4.17;

contract Voting {
    // 1. Initialize a few candidates
    // 2. Vote for a candidate
    // 3. Lookup vote count for each candidate
    bytes32[] public candidateNames;
    mapping (bytes32 => uint8) public votesReceived;

    address public owner;

    function Voting(bytes32[] _candidateNames) public {
        candidateNames = _candidateNames;   
        owner = msg.sender;
    }

    function voteForCandidate(bytes32 _candidateName) public {
        require(validCandidate(_candidateName));
        votesReceived[_candidateName] += 1;
    }
    
    function totalVotesFor(bytes32 _candidateName) view public returns (uint8) {
        return votesReceived[_candidateName];
    }
    
    function validCandidate(bytes32 _candidateName) view public returns (bool) {
        for(uint i=0; i < candidateNames.length; i++) {
            if (candidateNames[i] == _candidateName) {
                return true;
            }
        }
        return false;
    }

    function addCandidate(bytes32 _candidateName) public {
      require(owner == msg.sender);
      // Implement the logic
    }
}