New_coin.sol

//SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.11;

contract NewCoin {
    
    string public name;
    string public symbol;
    uint8 public decimals;
    uint256 public totalSupply;
    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;
    
    constructor() {
        name = "New coin";
        symbol = "MC";
        decimals = 18;
        totalSupply = 1000000 * (uint256(10) ** decimals);
        balanceOf[msg.sender] = totalSupply;
    }
    
    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
    
    function transfer(address _to, uint256 _value) public returns (bool succes) {
        require(balanceOf[msg.sender] >= _value);
        balanceOf[msg.sender] -= _value;
        balanceOf[_to] += _value;
        emit Transfer(msg.sender, _to, _value);
        return true;
    }
    
    function approve(address _spender, uint256 _value) public returns (bool succes) {
        allowance[msg.sender][_spender] = _value;
        emit Approval(msg.sender, _spender, _value);
        return true;
    }
    
    function transferFrom(address _from, address _to, uint256 _value) public returns (bool succes) {
        require(balanceOf[_from] >= _value);
        require(allowance[_from][msg.sender] >= _value);
        balanceOf[_from] -= _value;
        balanceOf[_to] += _value;
        allowance[_from][msg.sender] -= _value;
        emit Transfer(_from, _to, _value);
        return true;
    }
    
}