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--- cplusplus:pointers_3_slides [2019/03/31 21:32] – [Summary] mithat
+++ cplusplus:pointers_3_slides [2021/10/24 02:46] (current) – [Pointer arithmetic: addition] mithat
@@ Line 6: / Line 6: @@
 Pointers, arrays, arithmetic.\\
 Mithat Konar\\
-March 31, 2019
+October 23, 2021
 ===== Pointers and arrays =====
   * Arrays and pointers are closely related.
-  * An array name is like a constant pointer:
+  * Array names are like a constant pointers:
     * the block of memory where an array name points cannot be changed,
     * what is stored there can change.
@@ Line 51: / Line 51: @@
 ===== Pointer arithmetic =====
-  * Pointer arithmetic works differently from normal arithmetic.
+  * Pointer arithmetic works differently than normal arithmetic.
   * ''+'',  ''+='', ''-'', ''-='', ''++'', ''--'' do math in terms of the size of the pointed data type.
   * E.g., adding 1 to a pointer makes it point to the next block of memory corresponding to the size of the underlying type.
 <file cpp pointer-math.cpp>
@@ Line 78: / Line 79: @@
 </file>
-===== Pointer arithmetic =====
+===== Pointer arithmetic: pointer difference =====
 Subtracting one pointer from another returns the number of elements between two addresses:
@@ Line 166: / Line 167: @@
 ^ Operation                                                        ^ Example ^
-|Increment <code>pointer++</code>                                          |<code cpp>valptr++;  // points at 7</code> |
+|<code>pointer++</code>                                          |<code cpp>valptr++;  // points at 7</code> |
-|Decrement <code>pointer--</code>                                          |<code cpp>valptr--;  // now points at 4</code> |
+|<code>pointer--</code>                                          |<code cpp>valptr--;  // now points at 4</code> |
-|Arithmetic <code>pointer + int</code> and <code>pointer - int</code> |<code cpp>cout << *(valptr + 2); // prints 11</code> |
+|<code>pointer + int</code>                                      |<code cpp>cout << *(valptr + 2); // prints 11</code> |
-|Compound assignment <code>pointer += int</code>and<code>pointer -= int</code> |<code cpp>valptr = vals; // points at 4
+|<code>pointer += int</code>                                     |<code cpp>valptr = vals; // points at 4
 valptr += 2;   // points at 11</code> |
-|Pointer subtraction <code>pointer - pointer</code>                                |<code cpp>cout << valptr - val; // # of ints between valptr and val</code> |
+|<code>pointer - pointer</code>                                  |<code cpp>cout << valptr - vals; // # of ints between valptr and vals</code> |