// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.11;

contract Sender{
    constructor() payable {}


    function balance() public view returns (uint) {
        return address(this).balance;
    }

    function sendwithtransfer(address payable _addr) public {
        _addr.transfer(1 ether);
    }

    function SendWithSend(address payable _addr) public returns (bool) {
        bool sent = _addr.send(1 ether);
        return sent;
    }

    function SendWithCall(address payable _addr) public returns (bool) {
        (bool sent,) = _addr.call{value: 1 ether }("");
        return sent;
    }
}


contract Receiver{

    uint public a;
    uint public b;

    receive() external payable{
    a = 10;
    b = 9;
}

    function balance() public view returns (uint) {
        return address(this).balance;
    }
}