test.sol

contract simplestorage {

  uint public storedData;

  event Set(address indexed sender, uint data);

  function simplestorage(uint initVal) {
    storedData = initVal;
  }

  function set(uint x) {
    storedData += x;

    Set(msg.sender, storedData);
  }

  function set2(uint x) payable {
    storedData += x;
  }

  function get() constant returns (uint) {
    return storedData;
  }
}

contract simplestorage2 {

  uint public storedData;

  function set(uint x) {
    storedData += x;
  }

  function set2(uint x) payable {
    storedData += x;
  }

  function set3(address simpleAddr, uint x) {
    simplestorage(simpleAddr).set(x);
  }

  function set4(address simpleAddr, uint x) {
    simplestorage(simpleAddr).call.value(1)(bytes4(sha3("set2(uint256)")), x);
  }

  function get() constant returns (uint) {
    return storedData;
  }
}