C

pointer arithmetic on Arrray in c

int main(int argc, char *argv[])
{	// declare an array
    char *card_deck[] = {"Joker", "one", "two", "three", "four",
    					"five", "six", "seven", "eight", "nine",
                        "ten", "Jack", "Queen", "King"};
    // declare a point and make it point to the array;
  	// You need two ** because an array is a pointer to the first element in the array
  	// So you need a pointer to a pointer AKA double pointer
    char **ptr = card_deck;
    
    for (int deck = 0; deck <= 13; deck++)
    {
      	// Now you can increment the ptr in a loop and print all the elements of the array.
        ptr++;
        printf("
card deck %s", *ptr);
    }

C Arrays and Pointers

#include <stdio.h>
int main() {

  int x[5] = {1, 2, 3, 4, 5};
  int* ptr;

  // ptr is assigned the address of the third element
  ptr = &x[2]; 

  printf("*ptr = %d 
", *ptr);   // 3
  printf("*(ptr+1) = %d 
", *(ptr+1)); // 4
  printf("*(ptr-1) = %d", *(ptr-1));  // 2

  return 0;
}

C Pointers and Arrays

#include <stdio.h>
int main() {

  int i, x[6], sum = 0;

  printf("Enter 6 numbers: ");

  for(i = 0; i < 6; ++i) {
  // Equivalent to scanf("%d", &x[i]);
      scanf("%d", x+i);

  // Equivalent to sum += x[i]
      sum += *(x+i);
  }

  printf("Sum = %d", sum);

  return 0;
}