Don't need a cast to go up the inheritance hierarchy : cast « Class « C++

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C++ » Class » cast Screenshots  Don't need a cast to go up the inheritance hierarchy    class Base{ public:   Base() {};   virtual ~Base() {} }; class Derived : public Base{ public:   Derived() {}   virtual ~Derived() {} }; int main(int argc, char** argv) {   Base* b;   Derived* d = new Derived();   b = d; // Don.t need a cast to go up the inheritance hierarchy   d = static_cast<Derived*>(b); // Need a cast to go down the hierarchy   Base base;   Derived derived;   Base& br = base;   Derived& dr = static_cast<Derived&>(br);   int i = 3;   double result = static_cast<double>(i) / 10;   return (0); }            Related examples in the same category 1. class type-casting 2. The const_cast operator is used to explicitly override const and/or volatile in a cast. 3. Use const_cast on a const reference. 4. The static_cast operator performs a nonpolymorphic cast. 5. The reinterpret_cast operator converts one type into a fundamentally different type. 6. The dynamic_cast performs a run-time cast that verifies the validity of a cast. 7. Replacing typeid with dynamic_cast