Thursday, January 23, 2025
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C++ Pointers

Pointers in C++ are variables that store the memory address of another variable. They are declared using the * operator and are useful for direct memory manipulation.

Example:

cpp
int x = 42;
int *ptr = &x; // Pointer 'ptr' stores the address of 'x'
cout << *ptr; // Dereferencing 'ptr' gives the value of 'x' (42)

Key Features:

  1. Dynamic Memory Allocation: Use new and delete for memory management.
  2. Passing by Reference: Use pointers in functions to modify actual arguments.
  3. Data Structures: Essential for linked lists, trees, etc.
  4. Pointer Arithmetic: Navigate arrays efficiently.
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While powerful, pointers must be handled cautiously to avoid memory leaks and segmentation faults.

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