Update ex3_42.cpp

ch03/ex3_42.cpp

@@ -1,18 +1,15 @@
 #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;
+    vector<int> v{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
+    int arr[10];
+    for (int i = 0; i != v.size(); ++i) arr[i] = v[i];
+
+    for (auto i : arr) cout << i << " ";
+    cout << endl;
+
+    return 0;
 }