Fundamental types represent the most basic types handled by the machines where the code may run. But one of the major strengths of the C++ language is its rich set of compound types, of which the fundamental types are mere building blocks. An example of compound type is the string class. Variables of this type are able to store sequences of characters, such as words or sentences. A very useful feature! A first difference with fundamental data types is that in order to declare and use objects (variables) of this type, the program needs to include the header where the type is defined within the standard library (header <string> ): // my first string #include <iostream> #include <string> using namespace std; int main () { string mystring; mystring = "This is a string" ; cout << mystring; return 0; } printout: This is a string As you can see in the previous example, strings can be initialized with any valid string l...