//Write your own contracts here. Currently compiles using solc v0.4.15+commit.bbb8e64f. pragma solidity ^0.4.18; contract SimpleStore { struct UserStakeData { address stakeUser; uint256 skateTime; uint256 bonusValue; } //盘口=>用户按票购买记录 mapping(uint256=>mapping(uint256,UserStakeData)) StakeTicketData; } 0.4.18