stock.sol

pragma solidity ^0.4.10;

contract Stock {
    mapping (address => shares) stockHolders;
    uint numShares;
    
    function Stock() {
        numShares = 100;        
    }
    
    function payDividend(uint amount) {
        // get num stock holders
        // divide amount by num_stock_holders
        // pay out amount to all stock_holders
    }
    
    function buyStock() {
        // check total shares
        // add to mapping the number of shares owner has
    }

    function getShares() constant returns (uint) {
        return stockHolders[msg.sender];
    }

}