pragma solidity ^0.6.0;
pragma experimental ABIEncoderV2;


contract SimpleVoting {
    mapping (string => uint256) votesReceived;
    
    string[] public candidateList;
    mapping(address => bool) public checkVote;
    
    constructor(string[] memory candidateNames) public{
        candidateList = candidateNames;
    }
    
    
    function voteForCandidate(string memory candidate) public {
        require(checkVote[msg.sender] != true, "voted");
        checkVote[msg.sender] = true;
        votesReceived[candidate] += 1;
    }
    function totalVotesFor(string memory candidate) public view returns (uint256) {
        return votesReceived[candidate];
    }
    function candidateCount() public view returns (uint256) {
        return candidateList.length;
    }
}