Lecture Notes: Union C Programming

Welcome

• Start of the advanced course
• We will discuss unions in the C language

Key Topics

• Meaning and necessity of unions
• Differentiation between union and structure
• Basic example of a union
• Properties of a union

Unions in C Programming

• Definition: A data structure in which variables are held in the same memory space
• Usage: To conserve memory and enhance performance

Construction of Union

• Use the same memory location for all members
• Hold multiple data types
• Accessing: The size of the largest member defines the memory

Example of Union

• Syntax: union unionName { dataType member1; dataType member2; ... };
• Example of memory allocation

Practical Uses and Examples

• Real-world applications
• Concise and precise memory optimization
• Interaction with the compiler

Structs vs Unions

• Union: single memory space, holds value of one member at a time
• Structure: Each member has its own memory space
• Usage and limitations

Important Properties

• Simplicity in memory allocation
• Memory size adjustment
• Use in multiple versions of the code

Conclusion

• Clear understanding of the basic concept of unions is necessary
• Helpful in code optimization
• Don't forget to ask questions and subscribe