#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#define N 100
int a[N][N];
int n;
void Init (int n)
{
int i, j;
for (i = 0 ; i < n; ++i)
for (j = 0; j < n; ++j)
a[i][j] = 0;
}
void Magique (int n)
{
int i, j, k;
i = n - 1; j = n / 2;
for (k = 1; k <= n * n; ++k) {
a[i][j] = k;
if ((k % n) == 0)
i = i - 1;
else {
i = (i + 1) % n;
j = (j + 1) % n;
}
}
}
void Erreur (char s[])
{
printf ("Erreur fatale: %s\n", s);
exit (1);
}
void Lire (int *n)
{
printf ("Taille du carre' magique, svp?:: ");
scanf ("%d", n);
if ((*n <= 0) || (*n > N) || (*n % 2 == 0))
Erreur ("Taille impossible.");
}
void Imprimer (int n)
{
int i, j;
for (i = 0; i < n; ++i) {
for (j = 0; j < n; ++j)
printf ("%4d ", a[i][j]);
printf ("\n");
}
getch();
}
int main ()
{
clrscr();
Lire(&n);
Init(n); /* - */
Magique(n);
Imprimer(n);
return 0;
}