标识符未找到或不唯一。编译错误

Question

/home/ubuntu/token_sale/contracts/SandeepDappToken.sol:17:34：声明错误：标识符未找到或不唯一。\n function transfer(address _to, unit256 _value ) public returns (bool success)\n ^\xe2\x80\x94\xe2\x80\x93^\n编译失败。请参阅下面的\n代码：

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pragma solidity ^0.4.23;\n\ncontract SandeepDappToken\n{\n    // constructor\n\n    // set the v ariable\n    uint256  public totalSupply;\n\n    string public name = \xe2\x80\x98Dapp\xe2\x80\x99;\n\n    mapping(address => uint256) public balanceOf;\n\n    constructor(uint256 _initialSupply )  public {\n        balanceOf[msg.sender] = _initialSupply;\n        totalSupply = _initialSupply;\n    }\n\n    function  transfer(address _to, unit256  _value) public returns (bool success)\n    {\n        require(balanceOf[msg.sender] >= _value);\n    }\n}\n

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Answer 1

更改您的代码：

单位 256 到 uint256

function  transfer(address _to, uint256  _value) public returns (bool success)