gistfile1.c

#include <stdio.h>
#include <math.h>

#define SIZE 9

int matrix[SIZE][SIZE];

int main(void)
{
	int x, y, step;
	int value = 81;
	//int stepCount = (int)floor(SIZE / 2);

	//test printed values
	for(x = 0; x < SIZE; ++x)
		for(y = 0; y < SIZE; ++y)
			matrix[x][y] = 0;

	// main part

	for(y = 0; y < SIZE; ++y)
		matrix[0][y] = value--;

	for(x = 1; x < SIZE; ++x)
		matrix[x][SIZE - 1] = value--;

	for(y = SIZE - 2; y >= 0; --y)
		matrix[SIZE - 1][y] = value--;

	for( x < SIZE; x = 1; x < SIZE; --x)
		matrix[x][SIZE] = value--;


	// end main part

	for(x = 0; x < SIZE; ++x, printf("\n"))
		for(y = 0; y < SIZE; ++y)
			printf("%2d ", matrix[x][y]);

	return 0;
}