302 Inheritance

1. Child Contract

inheritance

// SPDX-License-Identifier: MIT
pragma solidity 0.8.18;

import {SimpleStorage} from "./SimpleStorage.sol";

contract AddFiveStorage is SimpleStorage {
    
}

2. sayHello function

sayHello function

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import {SimpleStorage} from "./SimpleStorage.sol";

contract AddFiveStorage is SimpleStorage {
    function sayHello() public pure returns(string memory) {
        return "Hello";
    }
}

3. Override / virtual overide

＊call AI help: I am trying to compile my solidity code, but I'm getting this error.

virtual / override

＊in {simpleStorage.sol} line 25 add "virtual" as following, "function store(uint256 _favoriteNumber) public virtual { // to update the favoriteNumber"

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

import {SimpleStorage} from "./SimpleStorage.sol";

contract AddFiveStorage is SimpleStorage {
    // +5
    // overrides
    // virtual override
    function store(uint256 _newNumber) public override {
        myFavoriteNumber = _newNumber + 5;
    }
 }