/*
	In C when we define a pointer variable we do so by preceding its name with an asterisk.
	In C we also give pointer a type which, in this case, refers to the type of data stored at the address we will be storing in our pointer.
*/

#include<stdio.h>

void main()
{
	int a=20;
	int *ptr;
	ptr=&a; // pointer ptr stores the address of variable a
	printf("value at a: %d \n",a);
	printf("address of a: %u \n",&a); //%u is used for address
	printf("value at pointer ptr: %u \n",ptr); 
	printf("value at the address stored in the pointer: %d\n",*ptr);
	printf("address of pointer: %u\n",&ptr);
}