How do you deallocate memory allocated with 'new' in C++?

In C++, when memory is allocated dynamically using the new operator, it is essential to manage that memory effectively to prevent memory leaks. The correct way to deallocate the memory allocated by new is by using the delete operator.

When an object is created with new, it's stored in the heap memory, and the delete operator appropriately frees that memory, allowing it to be reused later. This not only helps manage memory usage but also triggers the destructor for the object, ensuring that any necessary cleanup is performed.

In contrast, the other options provided do not correctly perform this function: the dispose operator is not a valid C++ mechanism for memory management, the free function is used in C for memory allocated with malloc and cannot be used with memory allocated with new, and the clear function is typically used in the context of containers from the Standard Template Library (STL) and is not used for managing raw memory allocation. Understanding these distinctions is crucial for effective memory management in C++.