智能合约测试例子

// SPDX-License-Identifier: MIT
pragma solidity >=0.4.11  Funder) funders;
    }

    uint numCampaigns;
    mapping (uint => Campaign)   campaigns;服务器托管

    function newCampaign(address beneficiary, uint goal) public  returns (uint ) {
       uint campaignID = numCampaigns++; 

         Campaign storage c = campaigns[campaignID];
       c.beneficiary=payable(beneficiary);
       c.fundingGoal=goal;
       c.amount=0;
       c.numFunders=0;
       return campaignID;
    }

    function contribute(uint campaignID) public payable   {

        
        Campaign storage c = campaigns[campaignID];
       
        c.funders[c.numFunders++] = Funder({addr: msg.sender, amount: msg.value});
        c.amount 服务器托管+= msg.value;

    }

    function checkGoalReached(uint campaignID) public    returns (bool reached) {
        Campaign storage c = campaigns[campaignID];
        if (c.amount 

Remix – Ethereum IDE

服务器托管，北京服务器托管，服务器租用 http://www.fwqtg.net

相关推荐: 数据在内存里面的存储

学习流程 —————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————…