Question

Write a program in c++ to do the following : (1) Declare an array a of size 10 and three pointer variables p, q, and v. (2) Write a loop to fill array a with values 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 (3) write following statement: p= &a[2]; q = &a[5]; i = *q - *p; cout<<“The value of i is”<< i; i = *p - *q; cout<<“The value of i is %d”<< i; 4) assign address of a to v. 5) write a loop to print values of array a using pointer variable v

Answer 1

//Program:

#include<iostream>
using namespace std;
int main()
{
   int a[10], *p, *q, *v; //Declare an array a of size 10 and three pointer variables p, q, and v
   int i;
   for(int i=0; i<10; i++)   //loop to fill array a with values 10, 20, 30, 40, 50, 60, 70, 80, 90, 100
   {
       a[i]=(i+1)*10;
   }
   p= &a[2];              //assigning value of a[2] to p
   q = &a[5];             //assigning value of a[5] to q
   i = *q - *p;
   cout<<"The value of i is"<< i<<endl;
   i = *p - *q;
   cout<<"The value of i is "<< i<<endl;
   v=a;                       //assign address of a to v
   for(i=0; i<10; i++)           //loop to print values of array a using pointer variable v
   {
      cout<<*(v+i)<<" ";
   }
   return 0;
}

//Output: