1.SimpleStorage.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;
contract SimpleStorage{
uint256 favoriteNumber;
struct People{
uint256 favoriteNumber;
string name;
}
People[] public people;
mapping(string => uint256) public nameToFavoriteNumber;
function store(uint256 _favoriteNumber) public{
favoriteNumber = _favoriteNumber;
}
function retrieve() public view returns (uint256)
{
return favoriteNumber;
}
function addPerson(string memory _name, uint256 _favoriteNumber) public {
people.push(People(_favoriteNumber,_name));
nameToFavoriteNumber[_name] = _favoriteNumber;
}
}