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bootcamp...ConstantStorage.sol

// SPDX-License-Identifier: MIT 

pragma solidity >=0.7.0 <0.9.0;

contract Store {
    uint public num;
    
    function setNum(uint _num) public {
        num = _num;
    }
}


contract StoreAndSet {
    uint public constant num = 42;
    uint public oops = 60;

    function delegateStoreNum(address _store, uint _num) public {
        (bool success, bytes memory data) = _store.delegatecall(
            abi.encodeWithSignature("setNum(uint256)", _num)
        );
        require(success);
    }
}