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Difference between structure & union -The major difference between the structure & union is the way of allocated memory. -The total memory required to store a structure variable is equal to the sum of the size of all the data members. e.g struct stud { int rno; //int =2 bytes char g; //char=1 byte float marks; // float= 4 bytes }s; In above example, 7 bytes(2+1+4) are required to store structured variable 's'. -In union, the total memory space allocated equal to the member of largest size. e.g. union stud { int rno; char g; float marks; }s; Here, the largest size is 4 bytes. Hence, the total memory required to store union variable is 4 bytes. All other members, share the same memory space. We can use only one member at a time in union. Sapna 02-15-2017 04:40 AM

union and structure the difference between union and structure is memory allocated and all elements in union are stored at same place and all elements in structure are separated memory allocation this main difference simhachalam amara 08-26-2014 02:24 AM

Union and Structure in C - The difference between structure and union is in the way the memory is allocated. - All elements in a Union are stored at the same place. - With structure, there's a separate memory location for each element. Aparna 07-5-2013 06:06 AM

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