Question

Make one program using Dev c++, and explain how program works

Final Program Requirements:

Declare an int variable and int array with four elements in the main program. Initial values for the intvariable and int array are hardcoded in the program.

Declare an int pointer in the main program.Program shows the values of the integer variable and integer arrayelements.

Program shows the addresses of the variable and each integer array element. Store addresses inpointers temporarily prior to displaying. The addresses can change whenever the program is run.

Program asks the user to enter an address. The addressis stored in a temporary int variable, and thencopied to the integer pointer.

Program asks for an integer value X. Using derefencing, the program changes the value pointed by thepointer address entered by the user to X.

Program asks if the user wants torun the program again.

Test Walkthrough

1. Enter an address. (The address should be one of the addresses shown in the program. Entering an invalidaddress is very dangerous, may cause the program to hang, or worse, cause the computer to stop responding.)

2. Enter an integer value.

3. Repeat steps 1 and 2 until the integer variable and integer array elements are all changed.

4. Enter an invalid choice.

5. Quit the program.

Answer 1

#include<iostream>
using namespace std;
int main()
{
   int i;
   int arr[4];
   arr[0]=100;
   arr[1]=200;
   arr[2]=300;
   arr[3]=400;
   i=1;
   int *p;
   p=&i;
   cout<<"value of variable i is "<<*p<<endl<<endl;
   cout<<"Address of variable i is "<<p<<endl<<endl;
   std::cout<<"address in unsigned integer " << reinterpret_cast<unsigned int>(p)<<endl;
   p=&arr[0];
   int cnt=0;
   cout<<" value and address of Array elements are"<<endl;
   while(cnt<=3)
   {
       cout<<"value "<<*p<<endl;
       cout<<"Address "<<p<<endl;
       p++;
       cnt++;
   }
  

   return 0;
}