Secret Variable

SecretVariable.sol

pragma solidity 0.4.24;

contract SecretVariable {

  uint256 secret;
  uint256 public guess;

  constructor(uint256 _secret) {
    secret = _secret;
  }

  function guess(uint256 value) public {
    guess = value;
  }

  function check() public returns (bool, uint) {
    if(guess == secret) return (true, 50);
    return (false, 0);
  }
}