text: var SimpleStorage = artifacts.require("./SimpleStorage.sol");
  var Invest = artifacts.require("./Invest.sol");
  
  module.exports = function(deployer) {
    deployer.deploy(SimpleStorage);
    deployer.deploy(Invest);
  };
  
  //這個文件是智能合約的部署文件，裡面約定了部署順序，依賴關係。