我對第 16 行出了什麼問題感到非常困惑。餘額米克__.發送___呃_米sG.s和nd和rmsg.sender= 總供應；

pragma solidity ^0.8.2;

contract Token {
   mapping(address => uint)public balances;
   mapping(address => mapping(address => uint))public allowance;

   int public totalSupply = 10000 * 10 ** 18;
   string public name = "JeddCoin";
   string public symbol = "JEDD";
   uint public decimals = 18;

  event Transfer(address indexed from, address indexed to, uint value);
  event Approval(address indexed owner, address indexed spender, uint 
value);

  constructor() {
      balances[msg.sender] = totalSupply;
  } 

  function balanceOf(address owner)public view returns(uint){
  return balances[owner];
  }

  function transfer(address to, uint value)public returns(bool){
      require(balanceOf(msg.sender)>= value, 'balance too low');
      balances[to] += value;
      balances[msg.sender] -= value;
      emit Transfer (msg.sender, to, value);
      return true;
  
  }
  function transferFrom(address from, address to, uint value) public 
returns(bool) {
      require(balanceOf(from) >= value, 'balance too low');
      require(allowance[from][msg.sender] >= value, 'allowance too low');
      balances[to] += value;
      balances[from] -= value;
      emit Transfer(from, to, value);
      return true;
  }

  function aprove(address spender, uint value)public returns(bool){
      allowance[msg.sender][spender] = value;
      emit Approval(msg.sender, spender, value);
      return true;
   }
}   

您正在嘗試uint與int: totalSupplyis 類型混合，int而balances映射到uint.

由於您totalSupply永遠不會低於零，因此您只需將其更改為uint. 這樣你就不必轉換任何東西並且你的類型更正確。

由於您已在第 4 行中聲明，balances因此也應該具有 type 。uint``totalSupply``uint

將第 7 行更改為uint public totalSupply = 10000 * 10 ** 18;，它不會顯示錯誤。

引用自：https://ethereum.stackexchange.com/questions/98293