fork download
copy 
  1. #include <stdio.h>
  2.  
  3. #define SIZE 5
  4.  
  5. int main(void)
  6. {
  7.     int values[SIZE] =
  8.     { 2, 4, 6, 8, 10 };
  9.  
  10.     int *vPtr;
  11.  
  12.     printf("Using array subscript notation:\n");
  13.  
  14.     for (int i = 0; i < SIZE; ++i)
  15.     {
  16.         printf("%d\t", values[i]);
  17.     }
  18.  
  19.     puts("");
  20.  
  21.     vPtr = values;
  22.  
  23.     printf("\nUsing pointer/offset notation:\n");
  24.  
  25.     for (int i = 0; i < SIZE; ++i)
  26.     {
  27.         printf("%d\t", *(vPtr + i));
  28.     }
  29.  
  30.     puts("");
  31.  
  32.     printf("\nUsing pointer/offset notation with array name:\n");
  33.  
  34.     for (int i = 0; i < SIZE; ++i)
  35.     {
  36.         printf("%d\t", *(values + i));
  37.     }
  38.  
  39.     puts("");
  40.  
  41.     printf("\nUsing pointer/subscript notation:\n");
  42.  
  43.     for (int i = 0; i < SIZE; ++i)
  44.     {
  45.         printf("%d\t", vPtr[i]);
  46.     }
  47.  
  48.     puts("");
  49.  
  50.     printf("\nElement 4 using values[4] = %d\n",
  51.            values[4]);
  52.  
  53.     printf("Element 4 using *(values + 4) = %d\n",
  54.            *(values + 4));
  55.  
  56.     printf("Element 4 using vPtr[4] = %d\n",
  57.            vPtr[4]);
  58.  
  59.     printf("Element 4 using *(vPtr + 4) = %d\n",
  60.            *(vPtr + 4));
  61.  
  62.     printf("\nAddress referenced by vPtr + 3: %p\n",
  63.            (void *)(vPtr + 3));
  64.  
  65.     printf("Value stored at that address: %d\n",
  66.            *(vPtr + 3));
  67.  
  68.     vPtr = &values[4];
  69.  
  70.     vPtr -= 4;
  71.  
  72.     printf("\nAddress after vPtr -= 4: %p\n",
  73.            (void *)vPtr);
  74.  
  75.     printf("Value stored at that address: %d\n",
  76.            *vPtr);
  77.  
  78.     return 0;
  79. }
Success #stdin #stdout 0s 5328KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Using array subscript notation:
2	4	6	8	10	

Using pointer/offset notation:
2	4	6	8	10	

Using pointer/offset notation with array name:
2	4	6	8	10	

Using pointer/subscript notation:
2	4	6	8	10	

Element 4 using values[4] = 10
Element 4 using *(values + 4) = 10
Element 4 using vPtr[4] = 10
Element 4 using *(vPtr + 4) = 10

Address referenced by vPtr + 3: 0x7ffce84f130c
Value stored at that address: 8

Address after vPtr -= 4: 0x7ffce84f1300
Value stored at that address: 2
https://ideone.com/e6IqLG
language:
C (gcc 8.3)
created:
4 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!