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错误：

browser/IERC20.sol:4:53：警告：此声明会影响现有声明。函数 totalSupply() 公共常量返回 (uint256 totalSupply);

browser/IERC20.sol:4:5: 阴影声明在这里： function totalSupply() public constant returns (uint256 totalSupply);

IERC20.sol

pragma solidity ^0.4.17;
interface IERC20 {
function totalSupply() public constant returns (uint256 totalSupply);
function balanceOf(address _owner) public constant returns (uint256 balance);
function transfer(address _to, uint256 _value) public returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
function approve(address _spender, uint256 _value) public returns (bool success);
function allowance(address _owner, address _spender) public constant returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}

INDToken.sol

pragma solidity ^0.4.11;

import './IERC20.sol';

contract INDToken is IERC20 {

    uint public constant _totalSupply = 1000000;

    string public constant symbol = "IND";
    string public constant name = "Indonesia Token";
    uint8 public constant decimals = 3;

    mapping(address => uint256) balances;
    mapping(address => mapping(address => uint256)) allowed;

    function INDToken() public {
        balances[msg.sender] = _totalSupply;
    }

    function totalSupply() public constant returns (uint256 totalSupply){
        return _totalSupply;
    }

    function balanceOf(address _owner) public constant returns (uint256 balance){
        return balances[_owner];
    }

    function transfer(address _to, uint256 _value) public returns (bool success){
        require(
            balances[msg.sender] >= _value
            && _value > 0
        );
        balances[msg.sender] -= _value;
        balances[_to] += _value;
        Transfer(msg.sender, _to, _value);
        return true;
    }

    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success){
        require(
            allowed[_from][msg.sender] >= _value
            && balances[_from] >= _value
            && _value > 0
        );
        balances[_from] -= _value;
        balances[_to] += _value;
        allowed[_from][msg.sender] -= _value;
        Transfer(_from, _to, _value);
        return true;
    }

    function approve(address _spender, uint256 _value) public returns (bool success) {
        allowed[msg.sender][_spender] = _value;
        Approval(msg.sender, _spender, _value);
        return true;
    }

    function allowance(address _owner, address _spender) public constant returns (uint256 remaining){
        return allowed[_owner][_spender];
    }

    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
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1 回答 1

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我认为问题在于函数名称作为返回值名称的重用。我会简单地删除返回值的名称，因为无论如何您都没有使用它：

function totalSupply() public constant returns (uint256) {

作为替代方案，您可以将其命名为不同的名称：

function totalSupply() public constant returns (uint256 total) {
于 2018-02-28T11:01:07.570 回答