Solidity 练习：函数输出
睡不醒的鲤鱼 2022-12-29 Web3 Solidity
# 一、题目说明
函数可以返回多个输出。
# 二、任务列表
- 编写 external view 函数 myFunc()，该函数返回两个输出：msg.sender 和 false。
# 三、解答代码
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;
contract FunctionOutputs {
// Functions can return multiple outputs.
function returnMany() public pure returns (uint, bool) {
return (1, true);
}
// Outputs can be named.
function named() public pure returns (uint x, bool b) {
return (1, true);
}
// Outputs can be assigned to their name.
// Here return statement can be omitted.
function assigned() public pure returns (uint x, bool b) {
x = 1;
b = true;
}
// Use destructuring assignment when calling another
// function that returns multiple outputs.
function destructuringAssigments() public pure {
(uint i, bool b) = returnMany();
// Outputs can be left out.
(, bool bb) = returnMany();
}
function myFunc() external view returns (address, bool) {
return (msg.sender, false);
}
}
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