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Hospital.sol

pragma solidity ^0.5.0;

contract Hospital {
    address owner;
    
    struct Patient {
        index uint;
        name string;
    }
    Patient
    constructor() public {
        owner = msg.sender;
    }
}

LandContract.sol

pragma solidity ^0.5.0;

contract LandContract {
  address owner;
  mapping (address => uint) public balances;

  struct Plot {
    address owner;
    bool forSale;
    uint price;
  }

  Plot[12] public plots;

  event PlotOwnerChanged(
    uint index
  );

  event PlotPriceChanged(
    uint index,
    uint price
  );

  event PlotAvailabilityChanged(
    uint index,
    uint price,
    bool forSale
  );

  constructor() public {
    owner = msg.sender;
    plots[0].price = 4000;
    plots[0].forSale = true;
    plots[1].price = 4000;
    plots[1].forSale = true;
    plots[2].price = 4000;
    plots[2].forSale = true;
    plots[3].price = 4000;
    plots[3].forSale = true;
    plots[4].price = 4000;
    plots[4].forSale = true;
    plots[5].price = 4000;
    plots[5].forSale = true;
    plots[6].price = 4000;
    plots[6].forSale = true;
    plots[7].price = 4000;
    plots[7].forSale = true;
    plots[8].price = 4000;
    plots[8].forSale = true;
    plots[9].price = 4000;
    plots[9].forSale = true;
    plots[10].price = 4000;
    plots[10].forSale = true;
    plots[11].price = 4000;
    plots[11].forSale = true;

  }

  function putPlotUpForSale(uint index, uint price) public {
    Plot storage plot = plots[index];

    require(msg.sender == plot.owner && price > 0);

    plot.forSale = true;
    plot.price = price;
    emit PlotAvailabilityChanged(index, price, true);
  }

  function takeOffMarket(uint index) public {
    Plot storage plot = plots[index];

    require(msg.sender == plot.owner);

    plot.forSale = false;
    emit PlotAvailabilityChanged(index, plot.price, false);
  }

  function getPlots() public view returns( address[] memory,  bool[] memory,  uint[] memory) {
    address[] memory addrs = new address[](12);
    bool[] memory available = new bool[](12);
    uint[] memory price = new uint[](12);

    for (uint i = 0; i < 12; i++) {
      Plot storage plot = plots[i];
      addrs[i] = plot.owner;
      price[i] = plot.price;
      available[i] = plot.forSale;
    }

    return (addrs, available, price);
  }

  function buyPlot(uint index) public payable {
    Plot storage plot = plots[index];

    require(msg.sender != plot.owner && plot.forSale && msg.value >= plot.price);

//    if(plot.owner == 0) {
//      balances[owner] += msg.value;
//    }else {
      balances[plot.owner] += msg.value;
//    }

    plot.owner = msg.sender;
    plot.forSale = false;

    emit PlotOwnerChanged(index);
  }

  function withdrawFunds() public {
    address payable payee = msg.sender;
    uint payment = balances[payee];

    require(payment > 0);

    balances[payee] = 0;
    require(payee.send(payment));
  }


  function destroy() payable public {
//    require(msg.sender == owner);
//    selfdestruct(address(owner));
  }
}