HelloWorld.sol

pragma solidity ^0.4.0;
contract HelloWorld {

    address public owener;
    
    mapping (address => uint) balances;
    
    
    function HelloWorld(){
        owener = msg.sender;
        balances[owener] = 1000; 
    }
    
    function transfer(address _to, uint _value) returns (bool success){
        if ( balances[msg.sender] < _value) {
            revert();
            return false;
        }
        
        else {
            balances[msg.sender] -= _value;
            balances[_to] += _value;
            return true;
        }
    }
    function getBalance(address _user) constant returns (uint) {
        return balances[_user];
    }
    
}