Question

CODE IN C PLEASE

Ask for user to input 4 different numbers

Use pointers in calculations instead of variables to calculate the sum of those 4 numbers

Print the sum

Use a pointer to a pointer for print operation

Answer 1

Answer:

Program:

#include<stdio.h>
int main()
{
   // variable declaration
   int a,b,c,d,tot,*total,**sum,*p,*q,*r,*s;
   // prompts the message
   printf("Enter four different numbers: ");
   // reads 4 integer values from the keyboard, and stores in the variables a,b,c,d
   scanf("%d%d%d%d",&a,&b,&c,&d);
   // storing the addresses of variables a,b,c,d into pointer variables p,q,r,s respectively
   p=&a;
   q=&b;
   r=&c;
   s=&d;
   // adding the contents of a,b,c,d using pointers and storing into the variable 'tot'
   tot=(*p+*q+*r+*s);
   // The address of 'tot' is stores into the pointer variable 'total'
   total=&tot;
   // The address of the pointer variable 'total' is again stored in pointer to poiter 'sum'
   sum=&total;
   // printing the resultant sum value using pointer to pointer
   printf("The sum of four numbers is=%d",**sum);
   return 0;
}

Program Screenshot:

Output Screenshot: