Adding Numbers using pointers

Adding numbers using pointers:

We can add two numbers by dereferencing the pointers that point to the variables storing those numbers.

The code for adding two numbers using pointers is:

 
#include <stdio.h>
int  main()
{
int  num1;
int  num2;
int  * ptrNum1;
int  * ptrNum2;
int  sum;
printf("Enter first ineteger: ");
scanf("%d", & amp; num1);
printf("Enter second ineteger: ");
scanf("%d", & amp; num2);
ptrNum1 = & amp;
num1; //making ptrNum1 point to num1
ptrNum2 = & amp;
num2; //making ptrNum2 point to num2
sum = * ptrNum1 + * ptrNum2; //dereferencing the pointers
printf("Sum is:  %d\n", sum);
return  0;
}

The input and output for the above code is:

Enter first ineteger: 5

Enter second ineteger: 3

Sum is: 8

We have created two integer variables num1and num2 and two pointers ptr1 and ptr2.
The sum variable stores the sum of the two integers.
ptr1and ptr2 point to num1 and num2
By dereferencing ptr1and ptr2 we stores the addition of the values stored in num1 and num2.