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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. 	int array[4] = {10, 20, 30, 40};		// Initial values in array
  5. 	int* ptr = &array[3];					// Point to the fourth element's memory address
  6.  
  7. 	// Print out values of last two elements
  8. 	printf("Third element value: %d\n", array[2]);
  9. 	printf("Fourth element value: %d\n", array[3]);
  10.  
  11. 	// Update values using pointer
  12. 	printf("Updating values of last two elements using pointer.\n");
  13. 	*ptr = 41;		// Update value of fourth element
  14. 	--ptr;			// Move pointer to third element.
  15. 	*ptr = 31;		// Update value of third element
  16.  
  17. 	// Print out update values of last two elements
  18. 	printf("Third element value: %d\n", array[2]);
  19. 	printf("Fourth element value: %d\n", array[3]);
  20.  
  21. 	// In this example, we didn't touch first and second elements' values of array,
  22. 	// which are "10" and "20".
  23.  
  24. 	return 0;
  25. }
  26.  
Success #stdin #stdout 0s 2052KB
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stdin
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Standard input is empty
stdout
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Third element value: 30
Fourth element value: 40
Updating values of last two elements using pointer.
Third element value: 31
Fourth element value: 41
https://ideone.com/lggkOk
language:
C (gcc 8.3)
created:
9 years ago
visibility:
public

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