simple storage factory.sol shadowing problem

[Shawon-Mandal]

When I write SimpleStorage public simpleStorage; the compiler shows that " this declaration shadows an existing declaration" and "identifier not found or not unique".

what should i do to solve this problem?

[alymurtazamemon]

@Shawon-Mandal It looks like you are creating another object of SimpleStorage with same name, but for better understanding copy paste your code and format it with back ticks.

[Shawon-Mandal]

contract simpleStorage{
    uint256 favouriteNumber;
  //  people public persons=people({favouriteNumber:33,Name:"Frank"}); //here this curlyBrackets{} means that we are going to get the data from the below struct people.
 
    mapping(string =>uint256) public nameToFavouriteNumber;  //think of mapping as a sort of dictonary.where each key is assinged with a certain value and each key returning a certain value.

//here,in this mapping,string is the key of the mapping and the uint256 is the value assinged to the key.

    struct People{ //Here we have created a new type of people.Its like a datatype.ex:uint,string.
        uint256 favouriteNumber;
        string Name;
    }

    People[] public people; //we've created a array with the same name as the struct data type.so that we can add more similar data inside the array related to the struct People.
    //here,People=struct People.and people is the array variable.

    // function assignNumber(uint256 _favouriteNumber ) public{ //we are assinging favourite number with the function called assign number.inside the function,the parameter is set to uint.
    //     favouriteNumber=_favouriteNumber;
    // }
    function retriveNumber() public view returns(uint256){
        return favouriteNumber;
    }
    //call data,memory,storage...call data is a temporary variable that cant be modified,memory is a temporary variable that can be modified.storage is a permanant variable that can be modified.
    // temporary means that its data only stays inside the function.
    // struct,mapping and arrays need to be given memory or call data keywords for adding them as different function parameters.
    function addPerson(string memory _name, uint256 _favouriteNumber) public{ //here,string needs to be given memeory keyword because,string is secretly an array.
        people.push(People(_favouriteNumber,_name)); //here,we are adding the favourite number and name inside the people array variable and the capitalised People refers to the struct data structure.
        nameToFavouriteNumber[_name]=_favouriteNumber;
    }

   
}

contract StorageFactory{
    SimpleStorage  public simpleStorage;

    
    function createSimpleStorageContract() public{

        simpleStorage= new SimpleStorage(); //this  new keyword says to solidity that we are going to create another contract called simpleStorage.
    }
}

here is the code,mentioned above.
I wanted to create a global variable named "SimpleStorage" same as Patrick did when he was writing it in his video.

[alymurtazamemon]

@Shawon-Mandal Your contract name match the variable name.

Change this contract name

- contract simpleStorage
+ contract SimpleStorage

[Shawon-Mandal]

thank you soo much!!!
I was literary ripping off my hair because of this problem.
You were a great help!