Question

Pointer Comparisons Assignment Write a small program called PointerComparisions LastName.cpp that • Declares an array of floats Name your array floatArray o Implicitly initialize your array with 4 numbers • Demonstrates memory address of arrays increase as the subscript increases o Use a for loop to compare each of the adjacent elements from first to last o Watch out for the bounds! • Demonstrates memory address of arrays decrease as the subscript decreases o Use a for loop to compare each of the adjacent elements from last to first o Watch out for the bounds! • Demonstrate equality with pointer comparison o Declare variable that points to floatArrayCopy that points to floatArray o Use the equals or not equals operator to determine if they are at the same memory location, printing the result. Save and submit PointerComparisions LastName.cpp

Answer 1

/*C++ program that demonstrates the floatArray and the pointer ,floatArrayPointer that points to the floatArray
and then display the values of floatArray from first to last and last to first using for loop. Then check the values of floatArray
and the pointer pointed by floatArrayPointer.
*/
//PointerComparisionsLastName.cpp
#include<iostream>
using namespace std;
int main()
{
   const int size=4;
   //float array with 4 elements
   float floatArray[]={15.5,14.5,25.5,12.5};

   //print the values and its memory addresses
   //using for loop from first to last
   cout<<"floatArray values from frist to last\n";
   for(int index=0;index<size;index++)
   {
       cout<<"Value : "<<floatArray[index]<<endl;
       cout<<"Address : "<<&floatArray[index]<<endl;
   }

   cout<<"\n\n";

   //print the values and its memory addresses
   //using for loop from last to first
   cout<<"floatArray values from last to first\n";
   for(int index=size-1;index>0;index--)
   {
       cout<<"Value : "<<floatArray[index]<<endl;
       cout<<"Address : "<<&floatArray[index]<<endl;
   }

   cout<<"\n\nChecking pointer array, floatArrayPointer values with floatArray values.\n";
   //create a pointer ,floatArrayPointer that points to floatArray
   float *floatArrayPointer=floatArray;

   for(int index=0;index<size;index++)
   {
       if(*(floatArrayPointer+index)==floatArray[index])
           cout<<*(floatArrayPointer+index)<<" = "
                   <<floatArray[index]<<endl;
       else
           cout<<*(floatArrayPointer+index)<<"not equal to "
                   <<floatArray[index]<<endl;
   }

   system("pause");
   return 0;
}

sample output:

floatArray values from frist to last Value : 15.5 Address : 005AF708 Value : 14.5 Address : 005AF70C Value : 25.5 Address : 005AF710 Value : 12.5 Address : 005AF714 floatArray values from last to first Value : 12.5 Address : 005AF714 Value : 25.5 Address : 005AF710 Value : 14.5 Address : 005AF70C Checking pointer array, floatArrayPointer values with floatArray values. 15. 5 = 15.5 14.5 = 14.5 25.5 = 25.5 12.5 = 12.5