What is the main difference between STRUCTURE and UNION?
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Answer Posted / priti
. union allocates the memory equal to the maximum memory
required by the member of the union but structure allocates
the memory equal to the total memory required by the
members.
2. In union, one block is used by all the member of the
union but in case of structure, each member have their own
memory space
1. Let’s say a structure containing an int, char and
float is created and a union containing int char float are
declared. struct TT{ int a; float b; char c; } Union UU{
int a; float b; char c; }
2. sizeof TT(struct) would be >9 bytes (compiler
dependent-if int,float, char are taken as 4,4,1)
3. sizeof UU(Union) would be 4 bytes as supposed from
above.If a variable in double exists in union then the size
of union and struct would be 8 bytes and cumulative size of
all variables in struct
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3) Int Matrix of certain size was given, We had few valu= es in it like this. =97=97=97=97=97=97=97=97=97=97=97 1 = | 4 | | 5 | &= nbsp; | 45 =97=97=97=97=97=97=97=97=97=97=97 &n= bsp; | 3 | 3 | 5 | = | 4 =97=97=97=97=97=97=97=97=97=97=97 34 |&nbs= p; 3 | 3 | | 12 | &= nbsp; =97=97=97=97=97=97=97=97=97=97=97 3 | &nbs= p; | 3 | 4 | = | 3 =97=97=97=97=97=97=97=97=97=97=97 3 | = ; | | | = ; 3 | =97=97=97=97=97=97=97=97=97=97=97 &= nbsp; | | 4 | = ; | 4 | 3 We w= ere supposed to move back all the spaces in it at the end. Note: = If implemented this prog using recursion, would get higher preference.
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