Solidity 从入门到实战（完结）

Solidity 从入门到实战（完结）

pragma solidity ^0.4.0;
//完成了从创建众筹事件、捐赠、提款的全部操作
contract zhongchou{
    //捐赠者的对象struct funder{
    address funderaddress;//捐赠者的地址uint  Tomoney; //捐赠者捐赠的金钱}//受益人的对象struct needer{
    address Needaddress;//受益人的地址uint goal;//受益人的目标值uint amount;//当前已经募集到多少钱uint funderAccount;//捐赠者的idmapping(uint => funder) map; //映射，将捐赠者的id与捐赠者绑定在一起}uint neederAmount; //受益人的id号，作为受益人的唯一标识mapping(uint => needer) needmap;//通过mapping将受益人的id与受益人绑定在一起//实现一个众筹的事件function NewNeeder(address _Needaddress,uint _goal){
    neederAmount++;needmap[neederAmount] = needer(_Needaddress,_goal,0,0);}//address _adderss:捐赠者的地址// uint _neederAmount： 受益人的idfunction contribute(address _adderss, uint  _neederAmount) payable{
    needer storage _needer = needmap[_neederAmount];//聚集到的资金增加_needer.amount +=msg.value;//捐赠人数增加_needer.funderAccount++;//将捐赠人的id与shouyi _needer.map[_needer.funderAccount] = funder(_adderss, msg.value);}//_neederAmount：收益人的idfunction IScompelete(uint _neederAmount){
    //获取受益人对象needer storage _needer = needmap[_neederAmount];//如果受益人金额》受益人的目标金额if(_needer.amount >= _needer.goal){
    //转账_needer.Needaddress.transfer(_neederAmount);}}function test() view returns(uint,uint,uint){
    return (needmap[1].goal,needmap[1].amount,needmap[1].funderAccount);}
}

创建众筹事件

捐赠

提款