contract BasicToken is ERC20Basic {

using SafeMath for uint256;

mapping(address => uint256) 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]);

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) {

return balances[_owner];

}

}
/**
 
 * @title Basic token
 
 * @dev Basic version of StandardToken, with no allowances.
 
 */
function totalSupply() public view returns (uint256) {

return totalSupply_;

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