Data commit

Task/Zig-zag-matrix/C/zig-zag-matrix.c

@@ -0,0 +1,23 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int c, char **v)
+{
+	int i, j, m, n, *s;
+
+	/* default size: 5 */
+	if (c < 2 || ((m = atoi(v[1]))) <= 0) m = 5;
+
+	/* alloc array*/
+	s = malloc(sizeof(int) * m * m);
+
+	for (i = n = 0; i < m * 2; i++)
+		for (j = (i < m) ? 0 : i-m+1; j <= i && j < m; j++)
+			s[(i&1)? j*(m-1)+i : (i-j)*m+j ] = n++;
+
+	for (i = 0; i < m * m; putchar((++i % m) ? ' ':'\n'))
+		printf("%3d", s[i]);
+
+	/* free(s) */
+	return 0;
+}