C Struct & Union Memory Map – Visual Explanation | Learn C Programming

C Struct & Union Memory Map (Visual Explanation)

C Programming में struct और union का difference सिर्फ definition से समझना मुश्किल है। असली खेल memory allocation का होता है। यह tool आपको visually दिखाता है कि:

• Struct में memory अलग-अलग कैसे allocate होती है
• Union में memory कैसे share होती है
• क्यों union size हमेशा largest member के बराबर होता है

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🧩 Struct & Union Memory Map

Visual Memory Allocation • Exam Friendly

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Select Data Type:
struct union

Members:
Format: name:type (int=4, char=1, float=4)

Struct vs Union – Exam Key Points

Struct	Union
Each member has separate memory	All members share same memory
Total size = sum of all members	Total size = size of largest member
All members accessible at same time	Only one member valid at a time

What if?

❓ Agar union me int aur char dono assign kare?

👉 Last assigned value hi valid hogi, baaki overwrite ho jayengi.

Example C Code

struct data {
  int a;
  char b;
  float c;
};

union data2 {
  int a;
  char b;
  float c;
};
  

FAQs – Struct & Union Memory Map

Q1. Union ka use kahan hota hai?
Ans (Hindi): Memory optimization aur embedded systems me.
Ans (English): Used for memory optimization in embedded systems.

Q2. Struct zyada safe kyu hai?
Ans (Hindi): Sab members independent hote hain.
Ans (English): Struct is safer because all members are independent.

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