pragma solidity ^0.4.8;

contract SafeMath {
  function safeMul(uint256 a, uint256 b) internal constant returns (uint256) {
    uint256 c = a * b;
    assert(a == 0 || c / a == b);
    return c;
  }

  function safeDiv(uint256 a, uint256 b) internal constant returns (uint256) {
    uint256 c = a / b;
    return c;
  }

  function safeSub(uint256 a, uint256 b) internal constant returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  function safeAdd(uint256 a, uint256 b) internal constant returns (uint256) {
    uint256 c = a + b;
    assert(c >= a);
    return c;
  }
}

contract ERC20Basic {
  uint256 public totalSupply;
  function balanceOf(address who) constant returns (uint256);
  function transfer(address to, uint256 value) returns (bool);
  event Transfer(address indexed from, address indexed to, uint256 value);
}

contract ERC20 is ERC20Basic {
  function allowance(address owner, address spender) constant returns (uint256);
  function transferFrom(address from, address to, uint256 value) returns (bool);
  function approve(address spender, uint256 value) returns (bool);
  event Approval(address indexed owner, address indexed spender, uint256 value);
}

contract QuantumXICO is ERC20, SafeMath {
	mapping(address => uint256) balances;
	uint256 public totalSupply;

	function balanceOf(address _owner) constant returns (uint256 balance) {
	    return balances[_owner];
	}

	function transfer(address _to, uint256 _value) returns (bool success) {
	    balances[msg.sender] = safeSub(balances[msg.sender], _value);
	    balances[_to] = safeAdd(balances[_to], _value);
	    Transfer(msg.sender, _to, _value);
	    return true;
	}

	mapping (address => mapping (address => uint256)) allowed;

	function transferFrom(address _from, address _to, uint256 _value) returns (bool success){
	    var _allowance = allowed[_from][msg.sender];
	    balances[_to] = safeAdd(balances[_to], _value);
	    balances[_from] = safeSub(balances[_from], _value);
	    allowed[_from][msg.sender] = safeSub(_allowance, _value);
	    Transfer(_from, _to, _value);
	    return true;
	}

	function approve(address _spender, uint256 _value) returns (bool success) {
	    allowed[msg.sender][_spender] = _value;
	    Approval(msg.sender, _spender, _value);
	    return true;
	}

	function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
	    return allowed[_owner][_spender];
	}

	uint256 public endTime;

	modifier during_offering_time(){
		if (now >= endTime) {
			throw;
		}else {
			_;
		}
	}

	function () payable during_offering_time {
		createTokens(msg.sender);
	}

	function createTokens(address recipient) payable {
		if (msg.value == 0) {
		  throw;
		}
		uint tokens = safeDiv(safeMul(msg.value, price), 1 ether);
		totalSupply = safeAdd(totalSupply, tokens);
		balances[recipient] = safeAdd(balances[recipient], tokens);
		if (!owner.send(msg.value)) {
		  throw;
		}
	}

	string 	public name = "QuantumXCoin";
	string 	public symbol = "QTMX";
	uint 	public decimals = 0;
	uint256 public INITIAL_SUPPLY = 1000000;
	uint256 public price;
	address public owner;

	function QuantumXICO() {
		totalSupply = INITIAL_SUPPLY;
		// Give all of the initial tokens to the contract deployer.
		balances[msg.sender] = INITIAL_SUPPLY;
		endTime = now + 1 weeks;
		owner = msg.sender;
		price = 100;
	}

}