openzeppelin-contracts/contracts/examples/ExampleToken.sol

pragma solidity ^0.4.0;

import "../StandardToken.sol";

contract ExampleToken is StandardToken {

    string public name = "ExampleToken";
    string public symbol = "TOK";
    uint public decimals = 18;

    // 1 ether = 500 example tokens 
    uint PRICE = 500;
    

    function () payable {
        createTokens(msg.sender);
    }
    
    function createTokens(address recipient) payable {
        if (msg.value == 0) throw;
    
        uint tokens = safeMul(msg.value, getPrice());

        totalSupply = safeAdd(totalSupply, tokens);
        balances[recipient] = safeAdd(balances[recipient], tokens);
    }
    
    // replace this with any other price function
    function getPrice() constant returns (uint result){
      return PRICE;
    }
}