Mithat Konar (the wiki)

User Tools

Site Tools

You are here: Mithat Konar (the wiki) » C++ notes » Pointers 3
cplusplus:pointers_3

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
cplusplus:pointers_3 [2014/04/29 20:39] – [Pointer arithmetic] mithatcplusplus:pointers_3 [2016/03/05 23:27] (current) – [Pointers 3] mithat
Line 1: Line 1:
 ====== Pointers 3 ====== ====== Pointers 3 ======
  
-Pointers, arrays, arithmetic.((Portions loosely adapted from: FIXME))+Pointers, arrays, arithmetic.
  
 ===== Pointers and arrays ===== ===== Pointers and arrays =====
Line 42: Line 42:
  
 <file cpp pointer-math.cpp> <file cpp pointer-math.cpp>
 +/** Pointer arithmetic. */
 #include <iostream> #include <iostream>
 using namespace std; using namespace std;
Line 66: Line 67:
  
 <file cpp subtracting-pointers.cpp> <file cpp subtracting-pointers.cpp>
 +/** Subtracting pointers */
 #include <iostream> #include <iostream>
 using namespace std; using namespace std;
Line 83: Line 85:
 ==== Walking down an array ==== ==== Walking down an array ====
  
-A common technique used to visit every element in an array is to //walking down an array// with a pointer:+A common technique used to visit every element in an array is to //walk down an array// with a pointer:
  
 <file cpp walk-down-array.cpp> <file cpp walk-down-array.cpp>
 +/** Walking down an array. */
 #include <iostream> #include <iostream>
 using namespace std; using namespace std;
Line 94: Line 97:
     int *vPtr = v;     int *vPtr = v;
  
-    for(int i=0; i<5; i++)+    for (int i = 0; i < 5; i++)
     {     {
         cout << *vPtr << endl;         cout << *vPtr << endl;
Line 107: Line 110:
  
 <file cpp walk-null-terminated.cpp> <file cpp walk-null-terminated.cpp>
 +/** Walking down a null-terminated array. */
 #include <iostream> #include <iostream>
 using namespace std; using namespace std;
Line 146: Line 150:
  
 ^ Operation                                                        ^ Example ^ ^ Operation                                                        ^ Example ^
-|<code>{pointer}++</code>                                          |<code cpp>valptr++;  // points at 7</code> | +|Increment <code>pointer++</code>                                          |<code cpp>valptr++;  // points at 7</code> | 
-|<code>{pointer}--</code>                                          |<code cpp>valptr--;  // now points at 4</code> | +|Decrement <code>pointer--</code>                                          |<code cpp>valptr--;  // now points at 4</code> | 
-|<code>{pointer} + {int}</code>and<code>{pointer} - {int}</code>   |<code cpp>cout << *(valptr + 2); // prints 11</code> | +|Arithmetic <code>pointer + int</code> and <code>pointer - int</code> |<code cpp>cout << *(valptr + 2); // prints 11</code> | 
-|<code>{pointer} += {int}</code>and<code>{pointer} -= {int}</code> |<code cpp>valptr = vals; // points at 4+|Compound assignment <code>pointer += int</code>and<code>pointer -= int</code> |<code cpp>valptr = vals; // points at 4
 valptr += 2;   // points at 11</code> | valptr += 2;   // points at 11</code> |
-|<code>{pointer} - {pointer}</code>                                |<code cpp>cout << valptr - val; // number of ints between valptr and val</code> |+|Pointer subtraction <code>pointer - pointer</code>                                |<code cpp>cout << valptr - val; // # of ints between valptr and val</code> |
  
cplusplus/pointers_3.1398803940.txt.gz · Last modified: 2014/04/29 20:39 by mithat
Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki