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Saturday, 29 June 2013

C program to illustrate the usage of pointers with arrays

Write a C program to illustrate the usage of pointers with arrays.

  #include <stdio.h>
  int main() {
        int data[100], n, i;

        /* get the number of inputs from user */
        printf("Enter the no of data:");
        scanf("%d", &n);

        /* get the input entries from user */
        printf("Enter your inputs:\n");
        for (i = 0; i < n; i++)
                scanf("%d", &data[i]);

        /* usage of pointers with arrays */
        for (i = 0; i < n; i++) {
                printf("Address and value of data[%d]:\n", i);
                printf("Addr(ptr): 0x%x,Addr(arry): 0x%x, val: %d\n\n",
                        (int)(data + i), (int)&data[i], *(data + i));
        return 0;

  jp@jp-VirtualBox:~/$ ./a.out
  Enter the no of data:5
  Enter your inputs:

  Address and value of data[0]:
  Addr(ptr): 0xbf9c7ab8,Addr(arry): 0xbf9c7ab8, val: 100

  Address and value of data[1]:
  Addr(ptr): 0xbf9c7abc,Addr(arry): 0xbf9c7abc, val: 200
  Address and value of data[2]:
  Addr(ptr): 0xbf9c7ac0,Addr(arry): 0xbf9c7ac0, val: 300

  Address and value of data[3]:
  Addr(ptr): 0xbf9c7ac4,Addr(arry): 0xbf9c7ac4, val: 400

  Address and value of data[4]:
  Addr(ptr): 0xbf9c7ac8,Addr(arry): 0xbf9c7ac8, val: 500

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