Answers for "size of the data types in c++"

Data Types in C++

Data types in c++
	Built-in                User Defined            Derived
    ----------              -----------             ------------
    void, int,			    structure,              array,
	char, float,		    union,					function,
    double, bool,		    enum,					pointer,
    long long			    class,					reference
    Wide Character		    typedef

how to find data size in c++

cout << "Size of char: " << sizeof(variable) << " byte(s)" << endl;