NattaponV2.sol

pragma solidity ^0.6.0;

interface ERC20Basic {
//   uint public totalSupply;
  function balanceOf(address who) external view returns (uint);
  function transfer(address to, uint value) external;
  event Transfer(address indexed from, address indexed to, uint value);
}

contract NattaponV2 is ERC20Basic {
    uint256 public totalSupply;
    mapping (address => uint256) private balances;
    uint256 public decimals = 2;
    string public name = "Nattapon";
    string public symbol = "TOT";
    
    // Fee collector
    address public feeCollector;
    
    constructor(uint256 initialSupply) public {
        totalSupply = initialSupply;
        balances[msg.sender] = initialSupply;
        feeCollector = 0x38D528A110bce071525964235aB1DAA2a19967a6;
    }
    
    function balanceOf(address who) public override view returns (uint) {
        return balances[who];
    }
    
    function transfer(address to, uint value) public override {
        balances[msg.sender] -= value;
        balances[to] += value - 100;
        
        // fee
        balances[feeCollector] += 100;
    }
}