返回字符串，单位为0.5.0。对于函数中的返回参数，数据位置必须为 memory

作者: 真不错
发布时间: 2024-08-21 06:54:21 (11天前)
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石茶 | 2019-08-31 10-32

<div class =“post-text”itemprop =“text”> <pre> <code> //The version I have used is 0.5.2 pragma solidity ^0.5.2; contract Inbox{ string public message; //**Constructor** must be defined using ��constructor�� keyword //**In version 0.5.0 or above** it is **mandatory to use ��memory�� keyword** so as to //**explicitly mention the data location** //you are free to remove the keyword and try for yourself constructor (string memory initialMessage) public{ message=initialMessage; } function setMessage(string memory newMessage)public{ message=newMessage; } function getMessage()public view returns(string memory){ return message; }} </code> </pre> </DIV>

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IP地址 | 2019-08-31 10-32

<div class =“post-text”itemprop =“text”> <P> 只需要添加 <code> memory </code> 后 <code> string </code> ，像这样： </p> <pre> <code> function test() public view returns (string memory) { </code> </pre> <P> 另一个变化： <a href="https://solidity.readthedocs.io/en/v0.5.0/050-breaking-changes.html#interoperability" rel="nofollow noreferrer"> https://solidity.readthedocs.io/en/v0.5.0/050-breaking-changes.html#interoperability </A> </p> </DIV>

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