From the course: C++ Best Practices for Developers

Unlock the full course today

Join today to access over 22,600 courses taught by industry experts or purchase this course individually.

Auto type deduction and initialization

Auto type deduction and initialization - C++ Tutorial

From the course: C++ Best Practices for Developers

Start my 1-month free trial

Auto type deduction and initialization

“

- [Instructor] The keyword auto tells a compiler to deduce the type of variable by the expression used to initialize it. Unlike other types, auto requires the variable to be initialized, so there's no chance of a variable running around uninitialized, preventing a difficult-to-find bug. Auto also helps us to write our code to interfaces and not to implementations, avoiding tight coupling. If you need a specific type, you can use auto with type initialization. Let's take a look at a few examples. Let's try to create a vector event. First, we initialize alpha to a vector event with the values one, two, and three. We try to do something similar with auto but we get a syntax error. Since initialization of auto expects one expression, not three. We then try to declare gamma with auto and an initializer list. The compiler is okay with it, but we created a variable of type initialize list event, not vector event. Then we defined delta with a vector event and an initialize list, that works…

Contents