Ethereum 以太坊：can'；t执行函数并有空余额

我有以下问题：

银行

余额

，该银行正在填充构造函数中为空的代币

令牌交易在

sendMoneyToCustomer

或标准功能

transfer

我使用齐柏林飞艇框架和以下示例代码来演示我的问题：

pragma solidity ^0.4.24;

import "browser/Ownable.sol";
import "browser/SafeMath.sol";
import "browser/BasicToken.sol";
import "browser/StandardToken.sol";


contract MyDemo is Ownable, BasicToken, StandardToken {

    using SafeMath for uint;

    address public owner;
    address public bank;
    address public customer;

    uint256 public constant decimals = 18;
    uint multiplier = 10**decimals;

    constructor(address _bank, address _customer) public {
        owner = msg.sender;
        bank = _bank;
        customer = _customer;

        balances[bank].add(10 * decimals);  //Bank gets Money
        allowed[bank][owner] = 1000000;     //Bank approved owner
    }//end constructor


    function sendMoneyToCustomer(uint _value) public returns(bool) {
        balances[bank] = balances[bank].sub(_value);
        balances[customer] = balances[customer].add(_value);
        return true;
    }

}

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10*小数

可能不是您想要的。（只有180）谢谢你，我还发现了另一个错误。必须是：

余额[银行]=

余额[银行]。添加（10**小数）或只是
余额[银行]=…
。