一 调试手段

《1 变量查看

（1）变量可设置为public
address public withDrawAddress= 0x0;

（2）在rimix函数变量调试栏，点击变量同名按钮，即可查看当前值

《2 日志查看

（1）增加event事件的事件声明
event TransferWithDraw(uint balance);

（2）在要调用日志的地方，执行事件调用
TransferWithDraw(withDraw);

（3）执行函数时，remix在logs列，有TransferWithDraw日志输出语句

《3 使用remix的Debug功能

（1）在remix右侧，点击执行要执行的函数

（2）查看remix下方，有执行结果输出

（3）点击remix下半部分的“Debug”按钮，在右侧弹出Debug工具栏

主要关心当前的调试步进，还有当前的变量值。

二 完整实例代码

pragma solidity ^0.4.14;

contract testFundContract {
    address owner;
    address public withDrawAddress = 0x0;
    
    event TransferWithDraw(uint balance);
    
    function testFundContract() {
        owner = msg.sender;
    }
    
    function withDrawAddress(address a) {
        require(msg.sender == owner);
        withDrawAddress = a;
        
    }
    
    function addFund() payable returns (uint) {
        return this.balance;
    }
    
    function withDraw() {
        require(this.balance > 0);
        
        if (0x0  == withDrawAddress ){
            revert();
        }
        
        uint withDraw = this.balance;
        withDrawAddress.transfer(withDraw);
        TransferWithDraw(withDraw);
        
    }
    
}