pragma solidity ^0.6.0; import " uint256) public balanceOf; mapping(address => mapping(address => uint256)) public allowance; constructor(string memory _name, string memory _symbol, uint8 _decimals, uint256 _totalSupply) public { name = _name; symbol = _symbol; decimals = _decimals; totalSupply = _totalSupply; balanceOf[msg.sender] = totalSupply; } function transfer(address _to, uint256 _value) ..