Difference between revisions of "Interview Preparation Pointers"
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Revision as of 08:43, 17 December 2016
Pointers : A pointer is a variable who's value is address of some other variable i.e. it can be address of some memory location.
<varaible_type> *<name>
eg :
int *pointer_to_integer
The above example , we have declared a pointer to a variable (pointer_to_integer), the variable stores the address of an integer .
Implementation of Pointer :
Code:
#include <stdio.h>
int main(void) {
int var = 20;
int *p;
p = &var;
printf("Pointer %d\n",var);
printf("Pointer %d\n",&var); // Prints the address of the varaible (var)
printf("Pointer %d\n",p);
printf("Pointer %d\n",*p); // Prints the value that (p) points to
return 0;
}
Output :
Pointer 20
Pointer 1809844068
Pointer 1809844068
Pointer 20
