Create smart_pointers.cpp

code/smart_pointers.cpp

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+#include <iostream>
+using namespace std;
+
+// A generic smart pointer class
+template <class T>
+class SmartPtr {
+    T* ptr; // Actual pointer
+public:
+    // Constructor
+    explicit SmartPtr(T* p = NULL) { ptr = p; }
+    // Destructor
+    ~SmartPtr() { delete (ptr); }
+    // Overloading dereferncing operator
+    T& operator*() { return *ptr; }
+    // Overloading arrow operator so that
+    // members of T can be accessed
+    // like a pointer (useful if T represents
+    // a class or struct or union type)
+    T* operator->() { return ptr; }
+};
+
+int main()
+{
+    SmartPtr<int> ptr(new int());
+    *ptr = 20;
+    cout << *ptr;
+    return 0;
+}