What is the difference between typedef and enum Mcq?
Note: Using typedef is not common in C++, because enum defines a type name automatically. The construct is more common in C, where enum without typedef must be used only as a tag, i.e. with enum keyword.
What is typedef and enum in C?
The typedef keyword allows us to rename a data type to a name that has more meaning to our program. The typedef statement may be specified by itself or as part of a enum or struct definition. The typedef defined new name is often the given the same name as the enum or struct definition.
What is the difference between typedef and using?
In C++, ‘using’ and ‘typedef’ performs the same task of declaring the type alias. There is no major difference between the two. The ‘using’ in C++ has the ability to create the alias-templates providing the ability for the underlying type, unlike the ‘typedef’ statement.
What is the difference between structure and union?
The size of a structure is equal or greater to the sum of the sizes of each data member. When the variable is declared in the union, the compiler allocates memory to the largest size variable member. The size of a union is equal to the size of its largest data member size.
What is enum in Java?
Java Enums. The Enum in Java is a data type which contains a fixed set of constants. Java Enums can be thought of as classes which have a fixed set of constants (a variable that does not change). The Java enum constants are static and final implicitly. It is available since JDK 1.5.
What is difference between enum and struct in C?
Structure is a data type that stores different data types in the same memory location; the total memory size of the structure is the summation of memory sizes of all its members. Meanwhile, Enum is a data type that store integral constants. That is the main difference between structure union and enum in C.
What is a typedef in C++?
The typedef keyword allows the programmer to create new names for types such as int or, more commonly in C++, templated types–it literally stands for “type definition”. Typedefs can be used both to provide more clarity to your code and to make it easier to make changes to the underlying data types that you use.
What is typedef typename?
typedef is to declare a type, typename is used to get the type which templates. elad said: 07-23-2004. I know of no place where you must use typename, only where you may use typename and where you can’t use typename (see previous posts).