100% prog to add numbers using functions

/*in this program we need not write function prototyping as we are directly defining the function in advance to the main()*/

#include<stdio.h>
void kooDu(int u,int a)
{
    int addition;
    addition=u+a;
    printf("\n sum of the given numbers=%d as printed in called function",addition);
  }
void main()
{
    int p,q;
    printf("\n enter 2 integers: ");
    scanf("%d%d",&p,&q);
    kooDu(p,q);//call by value
}

ఔట్పుట్ తెరమీద 

enter 2 integers: 2 5
sum of the given numbers=7 as printed in called function