/*----------------------------------------------------------
 *				HTBLA-Leonding / Class: <your class>
 * ---------------------------------------------------------
 * Exercise Number: 0
 * Title:			Pyramid of Numbers
 * Author:			<your name>
 * ----------------------------------------------------------
 * Description:
 * Calculates a pyramid of numbers, i.e., it multiplies a big
 * integer by the number 2, its result by 3, etc. and then
 * returns to the original value by subsequently dividing,
 * again starting by 2, 3, etc.
 * ----------------------------------------------------------
 */
#include <stdio.h>

/// The maximum number of digits allowed in a big int.
#define MAX_DIGITS 80

/** BigInt represents an integer number which can have MAX_DIGITS digits
*** @see MAX_DIGITS
*/
struct BigInt {
	/** number of digits of the big int. */
	int digits_count;

	/** array of digits of big int. */
	unsigned int the_int[MAX_DIGITS];
};

/** strtobig_int converts a string into a BigInt. If strtobig_int runs
*** against a character not between '0' and '9' the conversion stops
*** at this point.
*** @param *str The string to be converted.
*** @param len Number of characters in string to be converted.
*** @param *big_int The converted string now as BigInt.
* @return The number of characters converted.
*/
int strtobig_int(const char* str, int len, struct BigInt* big_int);

/** print_big_int() prints a BigInt.
*** @param *big_int The BigInt to be printed.
*/
void print_big_int(const struct BigInt *big_int);

/** multiply() multiplies a BigInt by an int.
*** @param big_int The BigInt to be multiplied.
*** @param factor The int value which is multiplied by BigInt.
*** @param *big_result The result of the multiplication.
*/
void multiply(const struct BigInt* big_int, int factor, struct BigInt* big_result);

/** divide() multiplies a BigInt by an int.
*** @param big_int The BigInt to be divided.
*** @param divisor The int value by which we want to devide big_int.
*** @param *big_result The result of the division.
*/
void divide(const struct BigInt* big_int, int divisor, struct BigInt* big_result);

/** copy_big_int() copies a BigInt to another BigInt.
*** @param from The source where we want to copy from.
*** @param *to The target where we want to copy to.
*/
void copy_big_int(const struct BigInt* from, struct BigInt* to);

/**
*** main() reads the base number from which the pyramid has to be calculated
*** into an array of char. The max. length of this number is MAX_DIGITS.
*** The number is checked to contain only digits. If not the program exits.
*** Then the inputted number is converted into a big int by calling the
*** function strtobig_int().
*** After the conversion the tower is calculated by calling the functions
*** multiply(), print_big_int(), and copy_big_int() consecutively from 2 to
*** 9 and then again with divide() instead of multiply() from 2 to 9.
***
*/
int main(int argc, char* argv[])
{
	return 0;
}