Am quite new to lightning and trying to sumup two numbers so far i have created component for suming numbers  in one component and another compnennt for display the result.
But getting error as "This page has an error. You might just need to refresh it. Action failed: c$UserInput$controller$Pressme [Cannot read property 'setParams' of null]  Failing descriptor: {c$UserInput$controller$Pressme}"

Here is my code:
 UserInput.cmp
 <aura:component implements="force:appHostable,flexipage:availableForAllPageTypes,flexipage:availableForRecordHome,force:hasRecordId,forceCommunity:availableForAllPageTypes" access="global" >
<aura:registerEvent name="loadMyEvent" type="c:Result"/>
    <aura:attribute name="input1" type="integer"/>
<p>hello from component1</p>
<br/>
<ui:inputnumber aura:id="input1" label="first value" required="true"/>
<ui:inputnumber aura:id="input2" label="secondvalue" required="true"/>
<ui:button label="sum" press="{!c.Pressme}"/>
<br/>
</aura:component>

UserInputController.js

({
Pressme:function(component,event,helper){
    alert('test');
var get_num1=component.find("input1").get("v.value");
    alert('test1=='+get_num1);
var get_num2=component.find("input2").get("v.value");
    alert('test2=='+ get_num2);
var res=parseInt(get_num1)+parseInt(get_num2);
    alert('result=='+ res);
//var evt=$A.get("e.c:Result");
    component.getEvent("Result").setParams({"pass_result":res}).fire();
//evt.setparam({"pass_result": 5});
    //evt.fire();
}
})


DisplayResult.cmp

<aura:component >
<aura:attribute name="Get_Result" type="Integer"/>
<aura:handler event="c:Result" action="{!c.getvaluefromApplicationEvent}"/>
The Result is {!v.Get_Result}
</aura:component>

DisplayResultcontroller.js

({
getvaluefromApplicationEvent:function(cmp,event){
var showresultvalue= event.getparam("pass_result");
cmp.set("v.Get_Result",showResultValue);
}
})

Result.evt

<aura:event type="application" description="Event template">
<aura:attribute name="pass_result" type="string"/>
</aura:event>

Thanks in advance...