Solidity payable 方法表现

 pragma solidity ^0.4.;

 contract Person {

     string public  name;
     uint age;
     uint private weight;
     string internal birthday;

     function Person() {
         name = "";
         age = ;
         weight = ;
         birthday = "0000-00-00";
     }

     function f0()  payable public returns(uint){
         return address(this).balance; // 只要一调用f0,balance就改了，不需要等f0执行结束
     }

     function f1() public returns(uint) {
         return address(this).balance; // 调用完f0,再调f1查询合约账户余额，与f0查到的相同
     }