Profit Splitting Contract

ProfitShare.sol

contract ProfitShare{
    address owner;
    uint public totalShares;
    uint public threshold;
    address[] public shareholders;
    mapping(address => uint) public shares;
    
    function ProfitShare(){
        owner = msg.sender;
    }
    
    function changeOwner(address newOwner) public returns (bool success){
        if(msg.sender == owner){
            owner = newOwner;
            success = true;
        }
        else success = false;
    }
    
    function editShare(address account, uint newShares) public returns (bool success){
        if(msg.sender == owner){
            if(newShares > shares[account]){
                if(shares[account] == 0){
                    shareholders[shareholders.length++] = account;
                }
                totalShares += (newShares-shares[account]);
                shares[account]=newShares;
            }
            else if(newShares == shares[account]){
                delete shares[account];
            }
            else{
                totalShares -= (shares[account]-newShares);
                shares[account] = newShares;
            }
            return true;
        }
        else return false;
        
    }
    
    function setThreshold(uint val) public {
        if(msg.sender==owner) threshold = val;
    }
    
    function(){
        if(this.balance > threshold){
            uint shareVal = this.balance / totalShares; 
            for(uint i; i < shareholders.length; i++){
                shareholders[i].send(shares[shareholders[i]]*shareVal);
            } 
        }
    }
    
}