add ex6.2 input

ex6.2/Array.hh

@@ -0,0 +1,68 @@
+#ifndef ARRAY_HH
+#define ARRAY_HH
+
+class Array {
+public:
+
+  Array(int size) : _size(size) {
+    _arr = new double[_size] ;
+  }
+
+
+  Array(const Array& other) : _size(other._size) {
+    _arr = new double[other._size] ;
+
+    // Copy elements
+    for (int i=0 ; i<_size ; i++) {
+      _arr[i] = other._arr[i] ;
+    }
+  }
+
+  ~Array() {
+    delete[] _arr ;
+  }
+
+
+  Array& operator=(const Array& other) 
+  {
+    if (&other==this) return *this ;
+    if (_size != other._size) {
+      resize(other._size) ;
+    }
+    for (int i=0 ; i<_size ; i++) {
+      _arr[i] = other._arr[i] ;
+    }
+    return *this ;
+  }
+
+  double& operator[](int index) {
+    return _arr[index] ;
+  }
+  const double& operator[](int index) const {
+    return _arr[index] ;
+  }
+
+  int size() const { return _size ; }
+
+  void resize(int newSize) {
+    // Allocate new array
+    double* newArr = new double[newSize] ;
+
+    // Copy elements
+    for (int i=0 ; i<_size ; i++) {
+      newArr[i] = _arr[i] ;
+    }
+
+    // Delete old array and install new one
+    delete[] _arr ;
+    _size = newSize ;
+    _arr = newArr ;
+  }
+
+
+private:
+  int _size ;
+  double* _arr ;
+} ;
+
+#endif