Finish ch3:ok_hand:

README.md

@@ -7,6 +7,7 @@
 - I don't know the standard answer, but I tried my best to keep the correctness, if you found any bug, please [tell me](https://github.com/Mooophy/Cpp-Primer/issues/new), thanks.
 - I have downloaded the headers from this book's [web site](http://www.informit.com/store/c-plus-plus-primer-9780321714114) and put them in the `include` folder.
 - In order to test the program in an efficient way, I also put the test data file in the `data` folder.
+- If you find any mistake of the questions. Please check the [Errata](http://ptgmedia.pearsoncmg.com/images/9780321714114/errata/9780321714114_errata_10-31-12.html) first.
 
 ### If you want to contribute this repository.
 

ch03/ex3_41.cpp

@@ -0,0 +1,15 @@
+#include <iostream>
+#include <vector>
+
+using std::vector; using std::cout; using std::endl; using std::begin; using std::end;
+
+int main()
+{
+  int int_arr[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
+  vector<int> ivec(begin(int_arr), end(int_arr));
+
+  for (auto i : ivec) cout << i << " ";
+  cout << endl;
+
+  return 0;
+}

ch03/ex3_42.cpp

@@ -0,0 +1,18 @@
+#include <iostream>
+#include <vector>
+
+using std::vector; using std::cout; using std::endl; using std::begin; using std::end;
+
+int main()
+{
+  vector<int> ivec{0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
+  int int_arr[10];
+
+  for (int* i = begin(int_arr); i != end(int_arr); ++i)
+    *i = ivec[i-begin(int_arr)];
+
+  for (auto i : int_arr) cout << i << " ";
+  cout << endl;
+
+  return 0;
+}

ch03/ex3_43.cpp

@@ -0,0 +1,28 @@
+#include <iostream>
+
+using std::cout; using std::endl;
+
+int main()
+{
+  int ia[3][4] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11};
+
+  // a range for to manage the iteration
+  for (const int (&p)[4] : ia)
+    for (int q : p)
+      cout << q << " ";
+  cout << endl;
+
+  // ordinary for loop using subscripts
+  for (size_t i = 0; i != 3; ++i)
+    for (size_t j = 0; j != 4; ++j)
+      cout << ia[i][j] << " ";
+  cout << endl;
+
+  // using pointers.
+  for (int (*p)[4] = ia; p != ia + 3; ++p)
+    for (int *q = *p; q != *p + 4; ++q)
+      cout << *q << " ";
+  cout << endl;
+
+  return 0;
+}

ch03/ex3_44.cpp

@@ -0,0 +1,31 @@
+#include <iostream>
+
+using std::cout; using std::endl;
+
+int main()
+{
+  int ia[3][4] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11};
+
+  // a range for to manage the iteration
+  // use type alias
+  using int_array = int[4];
+  for (int_array& p : ia)
+    for (int q : p)
+      cout << q << " ";
+  cout << endl;
+
+  // ordinary for loop using subscripts
+  for (size_t i = 0; i != 3; ++i)
+    for (size_t j = 0; j != 4; ++j)
+      cout << ia[i][j] << " ";
+  cout << endl;
+
+  // using pointers.
+  // use type alias
+  for (int_array* p= ia; p != ia + 3; ++p)
+    for (int *q = *p; q != *p + 4; ++q)
+      cout << *q << " ";
+  cout << endl;
+
+  return 0;
+}

ch03/ex3_45.cpp

@@ -0,0 +1,28 @@
+#include <iostream>
+
+using std::cout; using std::endl;
+
+int main()
+{
+  int ia[3][4] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11};
+
+  // a range for to manage the iteration
+  for (auto& p : ia)
+    for (int q : p)
+      cout << q << " ";
+  cout << endl;
+
+  // ordinary for loop using subscripts
+  for (size_t i = 0; i != 3; ++i)
+    for (size_t j = 0; j != 4; ++j)
+      cout << ia[i][j] << " ";
+  cout << endl;
+
+  // using pointers.
+  for (auto p = ia; p != ia + 3; ++p)
+    for (int *q = *p; q != *p + 4; ++q)
+      cout << *q << " ";
+  cout << endl;
+
+  return 0;
+}

docs/index.md

@@ -66,8 +66,12 @@ C++ Primer 5th Answer Note
     [3.36](https://github.com/pezy/Cpp-Primer/blob/master/ch03/ex3_36.cpp) |
     [3.37 ~ 3.38](/Cpp-Primer/ch03/ex3.37_3.38) |
     [3.39](https://github.com/pezy/Cpp-Primer/blob/master/ch03/ex3_39.cpp) |
-    [3.40](https://github.com/pezy/Cpp-Primer/blob/master/ch03/ex3_40.cpp)
-
+    [3.40](https://github.com/pezy/Cpp-Primer/blob/master/ch03/ex3_40.cpp) |
+    [3.41](https://github.com/pezy/Cpp-Primer/blob/master/ch03/ex3_41.cpp) |
+    [3.42](https://github.com/pezy/Cpp-Primer/blob/master/ch03/ex3_42.cpp) |
+    [3.43](https://github.com/pezy/Cpp-Primer/blob/master/ch03/ex3_43.cpp) |
+    [3.44](https://github.com/pezy/Cpp-Primer/blob/master/ch03/ex3_44.cpp) |
+    [3.45](https://github.com/pezy/Cpp-Primer/blob/master/ch03/ex3_45.cpp)
   - Chapter 4. Expressions
   - Chapter 5. Statements
   - Chapter 6. Functions

docs/template.html

@@ -14,7 +14,7 @@
             margin-top: 1em !important;
         }
         h3 { text-transform: uppercase; font-size: 0.99em; }
-        body { font-family: 'Merriweather', Georgia, serif; }
+        body { font-family: 'Merriweather', Georgia, serif; background-color: #fff6e7; }
         .content { font-size: 1em; }
         ul, ol { list-style-position: inside !important; }
     </style>