Solidity setName 函数编程 (BitDegree)

Question

作为 Bitdegree 学习稳固性课程的一部分。 我被要求做以下事情：

1. 以允许设置 name 值的方式修改函数 setName

2.创建一个名为 increaseCounter 的新函数，它会在每次调用时将 counter 的值增加 10

我已经尝试了多种方法来设置名称，但遇到了很多问题，如果有人可以帮助我解决这个问题，我将不胜感激，它是如此基本但由于某种原因没有任何工作:(。这是当前代码

pragma solidity ^0.4.16;

contract FunctionTest {
bool public foo = true;
string public name;
uint256 public counter = 0;

function setName() public {
    //
}

function writeToStorage() {
    foo = !foo;
}

function readFromStorageConstant() public constant returns (bool) {
    return foo;
}

function readFromStorageView() public view returns (bool) {
    return foo;
}

}

Answer 1

出于某种原因，它需要将变量“名称”初始化为字符串以使其提交。

pragma solidity ^0.4.16;

contract FunctionTest {
  bool public foo = true;
  string public name="ChuckNorris";
  uint256 public counter = 0;

  function setName(string _name) public {
    name = _name;
  }

  function increaseCounter() public {
    counter += 10;
  }

  function writeToStorage() {
    foo = !foo;
  }

  function readFromStorageConstant() public constant returns (bool) {
    return foo;
  }

  function readFromStorageView() public view returns (bool) {
    return foo;
  }
}

Answer 2

确保您回答了问题的两个部分。 出于某种原因，在本课中，setName() 函数在您完成 increaseCounter() 函数之前不会显示您已正确完成。这是帮助我进入下一个级别的解决方案。

pragma solidity ^0.4.16;

contract FunctionTest {
  bool public foo = true;
  string public name;
  uint256 public counter = 0;

  function setName(string _name) public {
    name = _name;
  }

  function increaseCounter() public {
    counter += 10;
  }

  function writeToStorage() {
    foo = !foo;
  }

  function readFromStorageConstant() public constant returns (bool) {
    return foo;
  }

  function readFromStorageView() public view returns (bool) {
    return foo;
  }

  funciton increaseCounter() {
    counter += 10; } 
}

Answer 3

应该很简单...

pragma solidity ^0.4.16;

contract FunctionTest {
  bool public foo = true;
  string public name;
  uint256 public counter = 0;

  function setName(string _name) public {
    name = _name;
  }

  function increaseCounter() public {
    counter += 10;
  }

  function writeToStorage() {
    foo = !foo;
  }

  function readFromStorageConstant() public constant returns (bool) {
    return foo;
  }

  function readFromStorageView() public view returns (bool) {
    return foo;
  }
}

Answer 4

// SPDX-License-Identifier: nolicense
pragma solidity ^0.8.0; 
contract sample{ 
  string public name; 

  function setName(string memory _newName) public returns(bool){
     name =_newName; 
     return true; 
  } 

  function getName() public view returns (string memory){ 
    return name; 
  } 
}