#include <stdio.h>
#include "prog3.h"

/* This program illustrates how to get two values back from a function.
 *
 * Since functions can only return a single value, we must either get
 * the values back via parameters, or create a structure that contains
 * the two values.  This program illustrates passing values back in
 * parameters.
 *
 * Note that C implements "pass by value" (known more informally as
 * pass by copy).  That means that a copy of each value is passed.  If
 * the function changes the parameter, it is only changing its own copy.
 * To simulate "pass-by-reference", we must pass the ADDRESS of the
 * variable whose value we wish to change.  The address is passed by
 * value, but that's OK because we don't want to change the address,
 * we want to change the value AT that address.
 */

int main(int argc, char *argv[])
{
	int i;          /* loop index variable */
	int num1;	/* num1 will be input from user */
	int num2;	/* num2 will be input from user */

        /* Set num1 and num2 to arbitrary values to illustrate a point.  */
        num1 = 111;
        num2 = 222;

	/* Get two numbers.  (This function is broken.) */
	tryToGet2Nums(num1, num2);

	/* Print num1 and num2. */
	printf("\n\tIn main: The user typed in %d and %d.  (NOT!)\n\n\n",
                num1, num2);

	/* Get two numbers.  (This function works.) */
	get2Nums(&num1, &num2);    /* Pass ADDRESSES of 2 variables. */

	/* Print num1 and num2. */
	printf("\n\tIn main: The user typed in %d and %d.\n\n\n", num1, num2);

}