/ * Spiral matrix * /
#include
#include
#define down 0
#define Left 1
#define up 2
#define right 3
// n * n matrix
#define n 5
Void PrintMatrix (int * a [], int N) {
INT I, J;
For (i = 0; i For (j = 0; j Printf ("% 4D", A [i] [j]); } Printf ("/ n"); } } Void Spiralmatrix (int * a [], int N) { INT I, J; // coordinate INT count; // counter INT K; // cycle variable INT DIRECT; / / Direction instruction i = 0; J = - N; count = 0; Direct = down; While (n> 0) { FOR (k = 0; k a [i] [j] = count ; Switch (Direct) { Case Down: i ; Break; Case LEFT: J -; Break; Case Up: I-; Break; Case Right: J ; Break; } } // If the direction just walked is Right, step size is reduced by 2, and correct the location IF (Direct == Right) { i ; J -; n - = 2; } // Direct = (Direct 1)% 4; } IF (n == 0) { a [i] [j] = count; } } Void main (void) { INT M [N] [N] = {0}; INT * a [N]; INT I; For (i = 0; i a [i] = m [i]; } Spiralmatrix (A, N); PrintMatrix (A, N); PRINTF ("Press any key to exit ..."); Getch (); }
