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What's the difference between union and struct 🤔

11/12/2019 8:07:12 AM

HADJ MAHAMMED mohammed el amine

2 Answers

New Answer

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In terms of syntax both are similar.... But main difference is in terms of memory management... In structure.. All members occupy memory and u can assign value to all or few of them... i.e a structure variable will have all data members. In union... Memory is allocated for largest member and u can assign or use ONLY ONE of many members... Say u have members as: Struct a{ int a; char b; double c; }; And u declare struct a myVar; Then size is 4+1+8 While for union with similar declaration only max memory ie 8 byte will be allocated..... Cause double occupies max memory out of the three.... And then u can store value for 1 member only... either for int or char or double

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Although Saurabh B explained it nicely but still if you need more information, just tap the link below https://www.google.com/amp/s/www.geeksforgeeks.org/difference-structure-union-c/amp/