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  1. #include <stdio.h>
  2. #include <string.h> /* memset */
  3. #include <stdlib.h> /* moalloc, calloc*/
  4. #include <string.h> /* memset */
  5. #include <assert.h> /* assert */
  6.  
  7. int *promptUser(unsigned size)
  8. {
  9. 	unsigned i;
  10.  
  11. 	int *myArray = calloc(size, sizeof(int));
  12.  
  13. 	/* is myArray is successfully allocated */
  14. 	assert(myArray != NULL);
  15.  
  16. 	/* prompt user to fill an array */
  17. 	for (i = 0; i < size; ++i)
  18. 	{
  19. 		printf("Enter a number: ");
  20. 		scanf("%d", &myArray[i]);
  21. 	}
  22.  
  23. 	return myArray;
  24. }
  25.  
  26. display(int *p)
  27. {
  28. 	unsigned i;
  29.  
  30. 	for (i = 0; i < sizeof(p) / p[0] + 1; ++i)
  31. 	{
  32. 		printf("%d\n", p[i]);
  33. 	}
  34. }
  35.  
  36. int main(void)
  37. {
  38. 	int *p;
  39. 	int size;
  40.  
  41. 	/* prompt for size */
  42. 	printf("Enter the size: ");
  43. 	scanf("%d", &size);
  44.  
  45. 	/* make sure the size only positive number */
  46. 	while (size <= 0 )
  47. 	{
  48. 		printf("Enter the size: ");
  49. 		scanf("%d", &size);
  50. 	}
  51.  
  52. 	p = promptUser(size);
  53.  
  54. 	display(p);
  55.  
  56. 	/* clean the memory */
  57. 	free(p);
  58.  
  59. 	return 0;
  60. }
  61.  
Success #stdin #stdout 0s 2188KB
comments (?)
stdin 
5
1
2 
3 
4 
5
stdout 
Enter the size: Enter a number: Enter a number: Enter a number: Enter a number: Enter a number: 1
2
3
4
5
https://ideone.com/RyHLdE
language:
C (gcc 8.3)
created:
9 years ago
visibility:
public

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