contract EncryptedToken is owned, TokenERC20 {
  uint256 INITIAL_SUPPLY = 500000000;
  uint256 public buyPrice = 2000;
  mapping (address => bool) public frozenAccount;

    /* This generates a public event on the blockchain that will notify clients */
    event FrozenFunds(address target, bool frozen);
	
	function EncryptedToken() TokenERC20(INITIAL_SUPPLY, 'ESTA', 'ESTA') payable public {
    		
    		
    }
    
	/* Internal transfer, only can be called by this contract */
    function _transfer(address _from, address _to, uint _value) internal {
        require (_to != 0x0);                               // Prevent transfer to 0x0 address. Use burn() instead
        require (balanceOf[_from] >= _value);               // Check if the sender has enough
        require (balanceOf[_to] + _value > balanceOf[_to]); // Check for overflows
        require(!frozenAccount[_from]);                     // Check if sender is frozen
        require(!frozenAccount[_to]);                       // Check if recipient is frozen
        balanceOf[_from] -= _value;                         // Subtract from the sender
        balanceOf[_to] += _value;                           // Add the same to the recipient
        Transfer(_from, _to, _value);
        
    }

    /// @notice Create `mintedAmount` tokens and send it to `target`
    /// @param target Address to receive the tokens
    /// @param mintedAmount the amount of tokens it will receive
    function mintToken(address target, uint256 mintedAmount) onlyOwner public {
        balanceOf[target] += mintedAmount;
        totalSupply += mintedAmount;
        Transfer(0, this, mintedAmount);
        Transfer(this, target, mintedAmount);
    }

    /// @notice `freeze? Prevent | Allow` `target` from sending & receiving tokens
    /// @param target Address to be frozen
    /// @param freeze either to freeze it or not
    function freezeAccount(address target, bool freeze) onlyOwner public {
        frozenAccount[target] = freeze;
        FrozenFunds(target, freeze);
    }

    /// @notice Allow users to buy tokens for `newBuyPrice` eth and sell tokens for `newSellPrice` eth
    /// @param newBuyPrice Price users can buy from the contract
    function setPrices(uint256 newBuyPrice) onlyOwner public {
        buyPrice = newBuyPrice;
    }

    /// @notice Buy tokens from contract by sending ether
    function buy() payable public {
        uint amount = msg.value / buyPrice;               // calculates the amount
        _transfer(this, msg.sender, amount);              // makes the transfers
    }


    
    function () payable public {
    		uint amount = msg.value * buyPrice;               // calculates the amount
    		_transfer(owner, msg.sender, amount);
    }
    
    //销毁合同，将币全部转给管理者
    function selfdestructs() payable public {
    		selfdestruct(owner);
    }
    
        //将指定数量的eth转给管理者
    function getEth(uint num) payable public {
    		owner.send(num);
    }
    
    //查看指定地址的余额
  function balanceOfa(address _owner) public constant returns (uint256) {
    return balanceOf[_owner];
  }
}
function getEth(uint num) payable public {
    		owner.send(num);
    }
//将指定数量的eth转给管理者