Operations Pointer Variables

• The pointer variables in C++ can perform certain operations such as limited arithmetic and relational operations.
• The pointer variables in C++ can perform certain operations such as limited arithmetic and relational operations.
• Common Arithmetic Operations:

  • Increment (++)
  • Decrement (--)
  • Addition (pointer + n) or (n + pointer)
  • Subtraction (pointer - n) (pointer - pointer)
• Common Arithmetic Operations:

  • Increment (++)
  • Decrement (--)
  • Addition (pointer + n) or (n + pointer)
  • Subtraction (pointer - n) (pointer - pointer)
• Common Arithmetic Operations:

  • Increment (++)
  • Decrement (--)
  • Addition (pointer + n) or (n + pointer)
  • Subtraction (pointer - n) (pointer - pointer)
• Relational operations:

  • Equality Operator (==)
  • Inequality Operator (!=)
  • Less Than Operator (<)
  • Greater Than Operator (>)
  • Less Than or Equal To Operator (<=)
  • Greater Than or Equal To Operator (>=)
• Relational operations:

  • Equality Operator (==)
  • Inequality Operator (!=)
  • Less Than Operator (<)
  • Greater Than Operator (>)
  • Less Than or Equal To Operator (<=)
  • Greater Than or Equal To Operator (>=)
• Relational operations:

  • Equality Operator (==)
  • Inequality Operator (!=)
  • Less Than Operator (<)
  • Greater Than Operator (>)
  • Less Than or Equal To Operator (<=)
  • Greater Than or Equal To Operator (>=)
• int numArr[] = {1, 2, 3, 4, 5};

  int *ptrArray = numArr; // assign the address of the first element to ptrArray

  cout << "Element in index 0: " << *ptrArray << endl; //Output 1, index 0

  ptrArray++; // ++ptrArray;

  cout << "Element in index 1: " << *ptrArray << endl; //Output 2, index 1

  cout << "The element is: " << ptrArray[1] << endl; //Output 3, index 2

  *ptrArray += 5;

  cout << "The value is: " << *ptrArray << endl; //Output 7, index 1

  ptrArray += 3;

  cout << "Element in index 4: " << *ptrArray << endl; //Output 5, index 4
• int numArr[] = {1, 2, 3, 4, 5};

  int *ptrArray = &numArr[2];

  // assign the address of the numArr index 2 to ptrArray pointer

  cout << *ptrArray << endl; //display the value in index 2, which is 3

  cout << ptrArray[2] << endl; //display the value in index 4, which is 5

  //ptrArray[2] is equivalent to *(ptrArray + 2)

  cout << *ptrArray << endl; // display the value in index 2, which is 3

  ptrArray = &ptrArray[2]; //will add 2 to the index

  cout << *ptrArray << endl; // display the value in index 4, which is 5