> **Source:** [https://foxhop.net/f3aadc3e-2f95-11f1-98f8-e86a64d24d78/cpp-pointers](https://foxhop.net/f3aadc3e-2f95-11f1-98f8-e86a64d24d78/cpp-pointers) > **Snapshot:** 2026-10-16T09:14:59Z > **Generator:** Remarkbox `d747782` > > *This is a thread snapshot. The living document lives at the source URI above — it may have been edited, extended, or replied-to since.*



# cpp Pointers **if p is a pointer** &p : the memory address of p \*p : the content that p points to p : the content of p (or the address that p points to) ## Dynamic memory allocation or alias **Useful but dangerous\...** ::: {#cb1} int *p, *q; // create two pointers, named p and q p = new int; // *p = 100; q = p; *q = 200; q = new int; *q = *p; delete p; // give memory that p occupied back to operating system p = NULL; // set p to memory address 0 delete q; // give memory that q occupied back to operating system q = NULL; // set q to memory address 0 ::: ## Dynamic Allocation for arrays ::: {#cb2} int size = 5; // create an integer int *A; // create an array of pointers A = new int[ size ]; // Ask for a certain size for your array A[0] = 10; // Give values to Array A[1] = 20; A[2] = 30; A[3] = 40; A[4] = 50; // 8 32 32 36 40 cout << &A << A << A + 0 << A + 1 << A + 2 // 10 28 30 cout << A[0] << A[1] << A[2] // 10 10 28 30 cout << *A << *A + 0 << A + 1 << * A + 2 delete []A; A = NULL; ::: --- **Source:** [https://foxhop.net/f3aadc3e-2f95-11f1-98f8-e86a64d24d78/cpp-pointers](https://foxhop.net/f3aadc3e-2f95-11f1-98f8-e86a64d24d78/cpp-pointers) **Snapshot:** 2026-10-16T09:14:59Z **Generator:** Remarkbox `d747782`