Solidity 练习：New
睡不醒的鲤鱼 2022-12-29 Web3 Solidity
# 一、题目说明
可以使用 new 关键字从一个合约创建一个新合约。下面给出被创建合约的内容。
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;
contract Account {
address public bank;
address public owner;
uint public withdrawLimit;
constructor(address _owner, uint _withdrawLimit) payable {
bank = msg.sender;
owner = _owner;
withdrawLimit = _withdrawLimit;
}
}
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# 二、任务列表
- 完成函数 createSavingsAccount，该函数将创建一个新的 Account 合约（withdrawLimit 为 1000）。
- 将新创建的合约加入到 accounts 数组。
# 三、解答代码
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;
import "./Account.sol";
contract Bank {
Account[] public accounts;
function createAccount(address _owner) external {
Account account = new Account(_owner, 0);
accounts.push(account);
}
function createAccountAndSendEther(address _owner) external payable {
Account account = (new Account){value: msg.value}(_owner, 0);
accounts.push(account);
}
function createSavingsAccount(address _owner) external {
Account account = new Account(_owner, 1000);
accounts.push(account);
}
}
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