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Sum of numbers using function in c++

#include<iostream>
using namespace std;
void ud(int Number1,int Number2)
{
int k;
k =Number1+Number2;

    cout<<k;
}
 main()

{
    int x,y;
    cout<<"enter no 1:";
    cin>>x;
    cout<<"enter no 2:";
    cin>>y;
    cout<<"sum of numbers is: ";
    ud(x, y);
}
****************************************
output:

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