Exceptional C++ Style 40 New Engineering Puzzles, Programming Problems, and Solutions

Chapter 21. Containers in Memory, Part 2: How Big Is It Really?

Difficulty: 3

When you ask for memory, what do you really know about what you get—and what it will actually cost? How much memory do the standard containers use—in theory, in reality, and in the code you'll be writing this afternoon?

JG Question

1. When you ask for n bytes of memory using new or malloc, do you actually use up n bytes of memory? Explain why or why not.

Guru Question

1. How much memory do the various standard containers use to store the same number of elements of the same type T?

Solution

“I'll Take 'Operator New' for 200 Bytes, Alex”

1. When you ask for n bytes of memory using new or malloc, do you actually use up n bytes of memory? Explain why or why not.

When you ask for n bytes of ...