#include <iostream.h>

void display_values(int a, int b)
	{
		a=1001;
		b=1001;

		cout << "The values within display_values are " 
		     << a << " and " << b<< endl;
	}
void main(void)
	{
		int big = 2002, small=0;

		cout << "Values before function"
		     << big << "and" 
		     << small << endl;

		display_values(big, small);

		cout << "Values after function"
		     << big << "and"
		     << small << endl;
	}

#include<iostream.h>

void change_values(int *a, int *b)
	{
		*a=1001;
		*b=1001;

		cout << "The values within the display_values are "
		     << *a << "and"
	             << *b << endl;
	}

void main(void)
	{
		int big = 2002, small=0;

		cout << " Values before function"
		     << big << "and"
		     << small << endl;

		change_values(&big, &small);

		cout << "Values after function"
		     << big << "and" 
		     << small << endl;
	}

#include <iostream.h>

void swap_values(float *a, float *b)
	{
		float temp;
		temp=*a;
		*a=*b;
		*b=temp;
	}

void main(void)
	{
		float big=10000.0;
		float smal=0.00001;

		swap_values(&big, &small);

		cout << "Big contains" << big << endl;
		cout << "Small contains" << small << endl;
	}

#include<iostream.h>

void swap_values(float& a, float& b)
	{
		float temp;

		temp=a;
		a=b;
		b=temp;
	}

void main(void)
	{
		float big=10000.0;
		float small=0.00001;
		float& big_alias=big;
		float& small_alias=small;
		
		swap_values(big_alias, small_alias);
		
		cout << "Big contains " << big << endl;
		cout << "Small contains" << small << endl;
	}