cplusplus:pointers_3
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cplusplus:pointers_3 [2014/04/29 20:54] – [Walking down an array] mithat | cplusplus:pointers_3 [2016/03/05 23:27] (current) – [Pointers 3] mithat | ||
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====== Pointers 3 ====== | ====== Pointers 3 ====== | ||
- | Pointers, arrays, arithmetic.((Portions loosely adapted from: FIXME)) | + | Pointers, arrays, arithmetic. |
===== Pointers and arrays ===== | ===== Pointers and arrays ===== | ||
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<file cpp pointer-math.cpp> | <file cpp pointer-math.cpp> | ||
+ | /** Pointer arithmetic. */ | ||
#include < | #include < | ||
using namespace std; | using namespace std; | ||
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<file cpp subtracting-pointers.cpp> | <file cpp subtracting-pointers.cpp> | ||
+ | /** Subtracting pointers */ | ||
#include < | #include < | ||
using namespace std; | using namespace std; | ||
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==== Walking down an array ==== | ==== Walking down an array ==== | ||
- | A common technique used to visit every element in an array is to //walking | + | 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 < | #include < | ||
using namespace std; | using namespace std; | ||
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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; | ||
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<file cpp walk-null-terminated.cpp> | <file cpp walk-null-terminated.cpp> | ||
+ | /** Walking down a null-terminated array. */ | ||
#include < | #include < | ||
using namespace std; | using namespace std; | ||
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^ Operation | ^ Operation | ||
- | |< | + | |Increment |
- | |< | + | |Decrement |
- | |< | + | |Arithmetic |
- | |< | + | |Compound assignment |
valptr += 2; // points at 11</ | valptr += 2; // points at 11</ | ||
- | |< | + | |Pointer subtraction |
cplusplus/pointers_3.txt · Last modified: 2016/03/05 23:27 by mithat