#include<stdio.h>
#include<conio.h>
void sum(int *,int *);
void main()
{
	int *p,*q;
	*p=3;
	*q=2;
	sum(p,q);
}
void sum(int *x,int *y)
{
	int sum1=0;
	sum1=*x+*y;
	cout<<sum1;
}


prgram  with no return.


#include<stdio.h>
#include<conio.h>
#include<iostream.h>
void sum(int *,int *);
void main()
{
	int *p,*q,z,y;
	z=4;
	y=5;
	p=&z;
	q=&y;
	sum(p,q);
}
void sum(int *x,int *y)
{
	int sum1=0;
	sum1=*x+*y;
	
	cout<<sum1;
}

program with return values.


#include<stdio.h>
#include<conio.h>
#include<iostream.h>
int sum(int *,int *);
void main()
{
	int *p,*q,z,y;
	z=4;
	y=5;
	p=&z;
	q=&y;
int ret=sum(p,q);
cout<<"\n\a"<<ret<<"\n\n";
}
int sum(int *x,int *y)
{
	int sum1=0;
	sum1=*x+*y;
	
	cout<<"\n\a"<<sum1;
	return(sum1);
}






loop functions


#include<stdio.h>
#include<conio.h>
#include<iostream.h>
void num(int *,int *);
void main()
{
	int *p,*q,z,y;
	
	for (z=1;z<=5;z++)
	
	{
		for (y=1;y<5;y++)
	{
	
			p=&z;
	
			q=&y;

	num(p,q);
		
	}
	
	}

	
		}

		void num(int *x,int *y)
{
	cout<<"x = "<<*x<<"\t\t"<<"y = "<<*y<<"\n";

		
	
	}



passing arrays in functionss
#include<stdio.h>
#include<conio.h>
#include<iostream.h>
void pass(int *);
void main()
{


	int a[5] = { 10,20,30,40,50};
	int *p;
	p = a;
		
	pass(p);
	
	
}
	
	
	void pass(int *x)
{
	
	for(int i = 0;i<5;i++)
	{
	
	cout<<x[i]<<"\n";

		
	
	}
}