Minimum needed abou types

Some languages are called dynamic-typed languages because the programmer doesn't need to care about the size a variable will assume in memory or if it's a number or character, structure, whatever.

Some languages are statically typed, meaning that once you declare a variable, you must also inform its type. Then attempts to set that typed variable with other data type will result in compilation error.

Sure, there is type casting, but it's a runtime resort and not always will give you the desired result.

C++ is statically typed, all variable sizes are set at compile time.

Variable size and hardware architecture

By size we mean the needed memory size to represent a value of that type. And depending on cpu architecture, that size nay vary based om how much memory can be addressed at once. Some types, such as byte, has a well-know size across all modern cpu architectures, others will vary.

How to build

clang++ -Wall sample-types.cc -o sample-types

How to run

./sample-types

Noteworthy

More complete guide on basic types can be found here and here.