OOP · medium

21. Inheritance

Extend a base contract.

Define `contract A` with `uint256 public x = 1;` and `contract B is A` adding `function bump() external { x += 1; }`.

Required in your answer: contract Acontract B is Ax += 1

Compiles with solc in your browser

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

// TODO contract A
// TODO contract B is A

Output appears here.