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ballot.sol

pragma solidity ^0.4.0;
contract Ballot {

    struct Voter {
        uint weight;
        bool voted;
        uint8 vote;
        address delegate;
    }
    struct Proposal {
        uint voteCount;
    }

    address chairperson;
    mapping(address => Voter) voters;
    Proposal[] proposals;

    /// Create a new ballot with $(_numProposals) different proposals.
    function Ballot(uint8 _numProposals) public {
        chairperson = msg.sender;
        voters[chairperson].weight = 1;
        proposals.length = _numProposals;
    }

    /// Give $(toVoter) the right to vote on this ballot.
    /// May only be called by $(chairperson).
    function giveRightToVote(address toVoter) public {
        if (msg.sender != chairperson || voters[toVoter].voted) return;
        voters[toVoter].weight = 1;
    }

    /// Delegate your vote to the voter $(to).
    function delegate(address to) public {
        Voter storage sender = voters[msg.sender]; // assigns reference
        if (sender.voted) return;
        while (voters[to].delegate != address(0) && voters[to].delegate != msg.sender)
            to = voters[to].delegate;
        if (to == msg.sender) return;
        sender.voted = true;
        sender.delegate = to;
        Voter storage delegateTo = voters[to];
        if (delegateTo.voted)
            proposals[delegateTo.vote].voteCount += sender.weight;
        else
            delegateTo.weight += sender.weight;
    }

    /// Give a single vote to proposal $(toProposal).
    function vote(uint8 toProposal) public {
        Voter storage sender = voters[msg.sender];
        if (sender.voted || toProposal >= proposals.length) return;
        sender.voted = true;
        sender.vote = toProposal;
        proposals[toProposal].voteCount += sender.weight;
    }

    function winningProposal() public constant returns (uint8 _winningProposal) {
        uint256 winningVoteCount = 0;
        for (uint8 prop = 0; prop < proposals.length; prop++)
            if (proposals[prop].voteCount > winningVoteCount) {
                winningVoteCount = proposals[prop].voteCount;
                _winningProposal = prop;
            }
    }
}

ERC20.sol

pragma solidity ^0.4.0;

interface ERC20 {
    function totalSupply() public view returns (uint256 totalSupply); //[Get the total token supply]
    function balanceOf(address _owner) public view returns (uint256 balance); //[Get the account balance of another account with address _owner]
    function transfer(address _to, uint256 _value) public returns (bool success); //[Send _value amount of tokens to address _to]
    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success); //[Send _value amount of tokens from address _from to address _to]
    function approve(address _spender, uint256 _value) public returns (bool success); //[Allow _spender to withdraw from your account, multiple times, up to the _value amount. If this function is called again it overwrites the current allowance with _value]
    function allowance(address _owner, address _spender) public view returns (uint256 remaining); //[Returns the amount which _spender is still allowed to withdraw from _owner]
    event Transfer(address indexed _from, address indexed _to, uint256 _value); // [Triggered when tokens are transferred.]
    event Approval(address indexed _owner, address indexed _spender, uint256 _value); //[Triggered whenever approve(address _spender, uint256 _value) is called.]

}

MyToken.sol

pragma solidity ^0.4.0;
import "browser/ERC20.sol";

contract MyFirstToken is ERC20 {
    // Declaring Variabels
    
    string public constant symbol = "MFT"; // Declaring symbol of MyToken like BCT for BitCoin
    string public constant name = "My First Token"; 
    uint8 public constant decimals = 18;
    
    uint private constant __totalSupply = 1000; // Total Supply Count 
    mapping (address => uint) private __balanceOf;
    mapping (address => mapping (address => uint)) private __allowances;
    
    function MyFirstToken() {
        __balanceOf[msg.sender] = __totalSupply;
    }
    
    function totalSupply() constant returns (uint _totalSupply) {
        _totalSupply = __totalSupply;
    }
    
    function balanceOf(address _addr) constant returns (uint balance) {
        return __balanceOf[_addr];
    }
    
    function transfer(address _to, uint _value) returns (bool success) {
        if(_value > 0 && _value <= balanceOf(msg.sender)) { // checking if sending value is > 0 and sending value is < sender balance
            __balanceOf[msg.sender] -= _value;
            __balanceOf[_to] += _value;
            return true;
        }
        
        return false;
    }
    
    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
        if(__allowances[_from][msg.sender] > 0 &&
            _value > 0 && 
            __allowances[_from][msg.sender] > _value) {
                __balanceOf[_from] -= _value;
                __balanceOf[_to] += _value;
                // Missed from the video
                __allowances[_from][msg.sender] -= _value;
                return true;
        }
        return false;
    }
    
    function approve(address _spender, uint256 _value) public returns (bool success) {
        __allowances[msg.sender][_spender] = _value;
        return true;
    }
    
    function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
        return __allowances[_owner][_spender];
    } 

}

TestToken.sol

pragma solidity ^0.4.0;

contract owned {
    address public owner;
    
    constructor() public {
        owner = msg.sender;
    }
    
    modifier onlyOwner {
        require(msg.sender == owner);
        _;
    }
    
    function transferableOwnership(address newOwner) onlyOwner public {
        owner = newOwner;
    }
}

interface tokenRecepient {
    function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) external;
}

contract TokenERC20 {
    // Public variables of Token
    
    string public name;
    string public symbol;
    uint8 public decimal = 18; // 18 decimal values is strongly suggested. Avoid changing it
    
    uint256 public totalSupply;
    
    // This creates an array with all balances
    mapping (address => uint256) public balanceof;
    mapping (address => mapping (address => uint256)) public allowance;
    
    // This generates a public events on blockchain that will notify clients
    event Transfer(address indexed from, address indexed to , uint256 value);
    
    // This generates a public events on blockchain that will notify clients
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
    
    // This notified client ablout the amount burns
    event Burn(address indexed From, uint256 value);
    
    // /** 
    //     * constructor function
    //     * 
    //     * Initializes contract with initial supply tokens with creator of contract
    //  */ 
    
    constructor(uint256 initialSupply, string tokenName, string tokenSymbol) public {
        totalSupply = initialSupply * 10 ** uint256(decimal); // update total supply with decimal amount
        balanceof
        
        
    }
}