" Expected '(' but got identifier " & " Parse error: mismatched input '{' expecting {';', '=

Question

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;
contract CrowdFunding 
{

struct Investor
{
address addr;
uint amount;
}

address public owner;       
uint public NumOfInvestors; 
uint public deadline;       
string public status;       
bool public isOver;         
uint public goalAmount;     
uint public totalAmount;    
mapping (uint => Investor) public investors; 

modifier onlyOwner () 
{
require(msg.sender == owner);
_;
}


function crowdfunding(uint _duration, uint _goalAmount) public
{
owner == msg.sender;
deadline = now + _duration;

goalAmount = _goalAmount;
status = "Funding";
isOver = "false";
NumOfInvestors = 0;
totalAmount = 0;
}


function fund() payable public
{

require(!isOver);

Investor inv = investors[NumOfInvestors++]; 
inv.addr = msg.sender;                      
inv.amount = msg.value;                     
totalAmount += inv.amount;
}


function checkGoalReached () public onlyOwner 
{


require(!isOver);


require(now >= deadline);

if(totalAmount >= goalAmount) 
{  
status = "Campaign succeeded.";
isOver = true;


if(!owner.send(this.balance)) 
{
throw;
}
else 
{ 

uint i = 0;
status = "Campaign Failed.";
isOver = true;

while (i <= NumOfInvestors) 
{

if(!investors[i].addr.send(investors[i].amount)) 
{
throw;   
}

i++;
}
}
}

function kill() public onlyOwner 
{
selfdestrct(owner);
}
}
}

我写了一个契约，但是在函数kill()的第一和第二行出现了错误。

显示"期望'('，但得到标识符"在第一行，和"解析错误:不匹配的输入"{"期望{";"，"="}[undefined] "在第二行

我仔细检查了我的代码结构，并阅读了一些来自StackOverflow的文章。

对于第一行显示的问题，那些文章说可能遗漏了"{"或"}"。但我没有射偏。(如果我真的想念他们，我就是一个该死的傻瓜。

关于第二行显示的问题，我只是不知道为什么它是错误的。会是版本问题吗?

请帮帮我。请求帮助。

Answer 1

您的

function kill() public onlyOwner 
{
selfdestrct(owner);
}

在另一个函数内部，将其移到外部，一切都会正常工作。请检查闭合括号}。此外，您还需要修复selfdestruct

的错字。工作代码:

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;
contract CrowdFunding 
{

struct Investor
{
address payable addr;
uint amount;
}

address payable public owner;       
uint public NumOfInvestors; 
uint public deadline;       
string public status;       
bool public isOver;         
uint public goalAmount;     
uint public totalAmount;    
mapping (uint => Investor) public investors; 

modifier onlyOwner () 
{
require(msg.sender == owner);
_;
}


function crowdfunding(uint _duration, uint _goalAmount) public
{
owner == msg.sender;
deadline = block.timestamp + _duration;

goalAmount = _goalAmount;
status = "Funding";
isOver = false;
NumOfInvestors = 0;
totalAmount = 0;
}


function fund() payable public
{

require(!isOver);

Investor storage inv = investors[NumOfInvestors++]; 
inv.addr = payable(msg.sender);                      
inv.amount = msg.value;                     
totalAmount += inv.amount;
}


function checkGoalReached () public onlyOwner 
{


require(!isOver);


require(block.timestamp >= deadline);

if(totalAmount >= goalAmount) 
{  
status = "Campaign succeeded.";
isOver = true;

address payable self = payable(address(this));
uint256 balance = self.balance;
if(!owner.send(balance)) 
{
revert();
}
else 
{ 

uint i = 0;
status = "Campaign Failed.";
isOver = true;

while (i <= NumOfInvestors) 
{

if(!investors[i].addr.send(investors[i].amount)) 
{
revert();   
}

i++;
}
}
}


}
function kill() public onlyOwner 
{
selfdestruct(owner);
}
}