Parent child single inheritance Smart contract

DemoSingleInheritance.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.13;

contract ParentContract{
    uint internal simpleInteger;
    function setInteger(uint _value) external{
        simpleInteger = _value;
    }
}

contract ChildContract is ParentContract{
    bool private simpleBool;
    function getInteger() public view returns(uint){
        return simpleInteger;
    }
}

contract Client {
    ChildContract pc = new ChildContract();
    function workWithInheritance() public returns (uint){
        pc.setInteger(100);
        return pc.getInteger();
    }
}