pyramid_of_numbers.c File Reference

#include <stdio.h>

Include dependency graph for pyramid_of_numbers.c:

Data Structures
struct	BigInt
Defines
#define	MAX_DIGITS   80
	The maximum number of digits allowed in a big int.
Functions
int	strtobig_int (const char *str, int len, struct BigInt *big_int)
void	print_big_int (const struct BigInt *big_int)
void	multiply (const struct BigInt *big_int, int factor, struct BigInt *big_result)
void	divide (const struct BigInt *big_int, int divisor, struct BigInt *big_result)
void	copy_big_int (const struct BigInt *from, struct BigInt *to)
int	main (int argc, char *argv[])

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Define Documentation

#define MAX_DIGITS   80

The maximum number of digits allowed in a big int.

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Function Documentation

void copy_big_int	(	const struct BigInt *	from,
		struct BigInt *	to
	)

copy_big_int() copies a BigInt to another BigInt.

Parameters:

	from	The source where we want to copy from.
	*to	The target where we want to copy to.

void divide	(	const struct BigInt *	big_int,
		int	divisor,
		struct BigInt *	big_result
	)

divide() multiplies a BigInt by an int.

Parameters:

	big_int	The BigInt to be divided.
	divisor	The int value by which we want to devide big_int.
	*big_result	The result of the division.

int main	(	int	argc,
		char *	argv[]
	)

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.

void multiply	(	const struct BigInt *	big_int,
		int	factor,
		struct BigInt *	big_result
	)

multiply() multiplies a BigInt by an int.

Parameters:

	big_int	The BigInt to be multiplied.
	factor	The int value which is multiplied by BigInt.
	*big_result	The result of the multiplication.

void print_big_int

(

const struct BigInt *

big_int

)

print_big_int() prints a BigInt.

Parameters:

*big_int

The BigInt to be printed.

int strtobig_int	(	const char *	str,
		int	len,
		struct BigInt *	big_int
	)

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.

Parameters:

	*str	The string to be converted.
	len	Number of characters in string to be converted.
	*big_int	The converted string now as BigInt.

Returns:

The number of characters converted.