c++

When we dynamically allocate an array, we often do so because we don't know the size of the array at compile time. We might write code such as size_t num-get_size(): //get_size returns number of elements needed int ptr = new int[num): for (int 'k - ptr:k!- ptr + num; ++k) /* process the array / to figure out the size of the array and then allocate and process the array. An interesting question is: What happens if get_size returns 0? This code will not compile This code works does not work. The language specifies that a call to new to create an array of size zero is illegal. It is illegal and we could not create an array variable of size 0 This code yields a run-time error The code works fine. The language specifies that a call to new to create an array of size zero is legal. It is legal even though we could not create an array variable of size 0 none of these