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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. void init_matrix ( double** m, unsigned n )
  5. {
  6.     int i, j;
  7. 	for ( i = 0; i < n; i++ )
  8. 	{
  9. 		for ( j = 0; j < n; j++ )
  10. 		{
  11. 			m[i][j] = n;
  12. 		}
  13. 	}
  14. }
  15.  
  16. void display_matrix ( double** m, unsigned n )
  17. {
  18. 	int i, j;
  19. 	for ( i = 0; i < n; i++ )
  20. 	{
  21. 		for ( j = 0; j < n; j++ )
  22. 		{
  23. 			printf ("%3.0lf", m[i][j] );
  24. 		}
  25. 		putchar('\n');
  26. 	}
  27. 	putchar('\n');
  28. }
  29.  
  30. void free_matrix ( double** m, unsigned n )
  31. {
  32. 	int i;
  33. 	for ( i = 0; i < n; i++ )
  34. 		free ( m[i] );
  35. 	free ( m );
  36. }
  37.  
  38. int main(void)
  39. {
  40. 	double** M = NULL;
  41. 	const int nmax = 10;
  42. 	int i, n;
  43.  
  44. 	for ( n = 1; n <= nmax; n++ )
  45. 	{
  46. 		M = realloc(M, n*sizeof(double*));
  47. 		for ( i = 0; i < n - 1; i++ )
  48. 		{
  49. 			M[i] = realloc(M[i], n*sizeof(double));
  50. 		}
  51. 		M[n-1] = malloc(n*sizeof(double));
  52.  
  53. 		init_matrix(M, n);
  54. 		display_matrix(M, n);
  55. 	}
  56.  
  57. 	free_matrix ( M, nmax );
  58. 	system("pause");
  59. 	return 0;
  60. }
Success #stdin #stdout 0s 1920KB
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https://ideone.com/XwERkw
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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