Sample code to transfer ether with a contract to contract function call

transfer ether with contract call.sol

pragma solidity ^0.4.13;

contract ForwardPaymentDemo {
	//init contract variables
	address owner;
    	address public RecievePaymentsDemo_addr;
    
	function ForwardPaymentDemo() { 
	    	owner = msg.sender;
	    	RecievePaymentsDemo_addr = new RecievePaymentDemo();
	}
    
    
    	function forward_payment() payable {
        	RecievePaymentDemo(RecievePaymentsDemo_addr).recieve_payment.value(msg.value/2)();
    	}
    
    	//change variable functions
    	function changeOwner(address _address) onlyBy(owner) { owner = _address; }

	modifier onlyBy(address _account) { require(msg.sender == _account);  _; }
	

	function kill() onlyBy(owner) { suicide(owner); }
	//Fallback
    	function() payable { msg.sender.transfer(msg.value); }
}

contract RecievePaymentDemo {
	//init contract variables
	address owner;
    	address ForwardPaymentDemo_addr;
    
	function RecievePayment() {
	    	owner = msg.sender;
	    	ForwardPaymentDemo_addr = msg.sender;
	}
	
	event payment_recieved(uint payment);
	function recieve_payment() payable {
	    	payment_recieved(msg.value);
	}
    
    	//change variable functions
    	function changeOwner(address _address) onlyBy(owner) { owner = _address; }

	modifier onlyBy(address _account) { require(msg.sender == _account);  _; }
	
	function kill() onlyBy(owner) { suicide(owner); }
    	//Fallback
    	function() payable { msg.sender.transfer(msg.value); }
}