static_cast

For “well-behaved” and “reasonably well-behaved” casts, including things you might now do without a cast (such as an automatic type conversion).

const_cast

To cast away const and/orvolatile.

reinterpret_cast

To cast to a completely different meaning. The key is that you’ll need to cast back to the original type to use it safely. The type you cast to is typically used only for bit twiddling or some other mysterious purpose. This is the most dangerous of all the casts.

dynamic_cast

For type-safe downcasting (this cast will be described in Chapter 15).