Union is an user defined datatype in C programming language . It is a collection of variables of different datatypes in the same memory location. We can define a union with many members, but at a given point of time only one member can contain a value.
Read moreWhat is a union in C++?
A union is a user-defined type in which all members share the same memory location . This definition means that at any given time, a union can contain no more than one object from its list of members.
Read moreWhat does typedef mean in C++?
What is typedef in C and C++? As the name itself suggests, typedef stands for “type definition ”. typedef is nothing but a way to assign a new name to a pre-existing data type. In other words, typedef is basically a reserved keyword that we use in order to create an alias name for a specific data type.
Read moreWhat is the difference between typedef and struct?
Basically struct is used to define a structure. But when we want to use it we have to use the struct keyword in C. If we use the typedef keyword, then a new name, we can use the struct by that name, without writing the struct keyword .
Read moreWhat is the difference between union and struct?
A structure is a user-defined data type available in C that allows to combining data items of different kinds. Structures are used to represent a record. A union is a special data type available in C that allows storing different data types in the same memory location.
Read moreWhat is typedef when it will be used?
typedef is a reserved keyword in the programming languages C and C++. It is used to create an additional name (alias) for another data type , but does not create a new type, except in the obscure case of a qualified typedef of an array type where the typedef qualifiers are transferred to the array element type.
Read moreCan you typedef a typedef?
The typedef specifier cannot be combined with any other specifier except for type-specifiers . The typedef-names are aliases for existing types, and are not declarations of new types. Typedef cannot be used to change the meaning of an existing type name (including a typedef-name).
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