function pss by refrence example

//Pass by refrence:
#include"stdio.h"
#include"conio.h"
//Decliration
void addconstant(int&,int);

void main()
{
     int a=100,b=90;
    printf("a=%d , b=%d",a,b);
    addconstant(a,b);
    printf("\ta=%d , b=%d",a,b);
    getch();
}
//Defination
void addconstant( int &x,int y)
{
    x=x + y;
}

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