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  1. // Java program to print a given matrix in spiral form 
  2. import java.io.*; 
  3.  
  4. class GFG { 
  5. 	// Function print matrix in spiral form 
  6. 	static void spiralPrint(int m, int n, int a[][]) 
  7. 	{ 
  8. 		int i, k = 0, l = 0; 
  9. 		/* k - starting row index 
  10. 		m - ending row index 
  11. 		l - starting column index 
  12. 		n - ending column index 
  13. 		i - iterator 
  14. 		*/
  15.  
  16. 		while (k < m && l < n) { 
  17. 			// Print the first row from the remaining rows 
  18. 			for (i = l; i < n; ++i) { 
  19. 				System.out.print(a[k][i] + " "); 
  20. 			} 
  21. 			k++; 
  22.  
  23. 			// Print the last column from the remaining columns 
  24. 			for (i = k; i < m; ++i) { 
  25. 				System.out.print(a[i][n - 1] + " "); 
  26. 			} 
  27. 			n--; 
  28.  
  29. 			// Print the last row from the remaining rows */ 
  30. 			if (k < m) { 
  31. 				for (i = n - 1; i >= l; --i) { 
  32. 					System.out.print(a[m - 1][i] + " "); 
  33. 				} 
  34. 				m--; 
  35. 			} 
  36.  
  37. 			// Print the first column from the remaining columns */ 
  38. 			if (l < n) { 
  39. 				for (i = m - 1; i >= k; --i) { 
  40. 					System.out.print(a[i][l] + " "); 
  41. 				} 
  42. 				l++; 
  43. 			} 
  44. 		} 
  45. 	} 
  46.  
  47. 	// driver program 
  48. 	public static void main(String[] args) 
  49. 	{ 
  50. 		int R = 3; 
  51. 		int C = 6; 
  52. 		int a[][] = { { 1, 2, 3, 4, 5, 6 }, 
  53. 					{ 7, 8, 9, 10, 11, 12 }, 
  54. 					{ 13, 14, 15, 16, 17, 18 } }; 
  55. 		spiralPrint(R, C, a); 
  56. 	} 
  57. }
Success #stdin #stdout 0.04s 2184192KB
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1 2 3 4 5 6 12 18 17 16 15 14 13 7 8 9 10 11
https://ideone.com/VA6OLn
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

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