contract BasicToken is ERC20Basic {

    using SafeMath for uint256;

    mapping(address => uint256) public balances;

    uint256 totalSupply_;

    /**
    * @dev total number of tokens in existence
    */

    function totalSupply() public view returns (uint256) {

        return totalSupply_;

    }

 
    /**
    * @dev transfer token for a specified address
    * @param _to The address to transfer to.
    * @param _value The amount to be transferred.
    */

   function transfer(address _to, uint256 _value) public returns (bool) {

        require(_to != address(0));

        require(_value <= balances[msg.sender]);

        // SafeMath.sub will throw if there is not enough balance.

        balances[msg.sender] = balances[msg.sender].sub(_value);

        balances[_to] = balances[_to].add(_value);

        emit Transfer(msg.sender, _to, _value);

        return true;

    }

    /**
    * @dev Gets the balance of the specified address.
    * @param _owner The address to query the the balance of.
    * @return An uint256 representing the amount owned by the passed address.
    */

    function balanceOf(address _owner) public view returns (uint256 balance) {

        return balances[_owner];

    }

}
function balanceOf(address _owner) public view returns (uint256 balance) {

    return balances[_owner];

}

/**
 * @dev Gets the balance of the specified address.
 * @param _owner The address to query the the balance of.
 * @return An uint256 representing the amount owned by the passed address.
 */