Become familiar with structures and unions from "summary" of C/C++ Programmer's Reference by Herbert Schildt
To work effectively in C or C++, you must become proficient with structures and unions. These two features enable you to create complex data types that can hold multiple pieces of related information. In this way, structures and unions are similar to arrays. However, structures and unions offer more flexibility and power. A structure is a user-defined data type that groups together related variables of different data types. For example, you can create a structure to represent a person, with variables for the person's name, age, and address. Each variable in a structure is called a member. You can access members of a structure using the dot operator. Unions are similar to structures, but with one key difference: in a union, all members share the same memory location. This means that only one member of a union can be used at a time. Unions are useful when you need to store different types of data in the same memory location. For examp...
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