Difference between "Struct" of "C" & "C++" ?

Difference:

C Struct :
-> Cannot have member functions.
-> Cannot exhibit polymorphic behaviour.
-> "Struct MyStruct a". "Struct" Keyword required while declaration.

C++ Struct:
-> Can have member functions.
-> Can exhibit polymorphic behaviour.
-> "MyStruct a". "Struct" Keyword not required while declaration.




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Difference between Class and Struct in C++ ?

Current post is on difference between Class and Structure in C++ language.

Difference:

Struct:
- By default access is public

Class :
- By default access is private

It means when:
- member variable is declared
- member function is declared
- It is derived

and one does not specific the access specifier, it will get defaulted to mentioned access specifier

Structure Key Points:

- Struct can have member functions.
- Struct can be derived.
- Struct can have polymorphic behavior.



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Check whether computer is Little Endian / Big Endian ?

Current post is on how to check whether computer is Big Endian or Little Endian.

It is a common technical interview question to test your knowledge on computer architecture.

Endianness refers - the order in which computer stores the bytes.

Little Endian - Stores LSB (Least Significant Byte) in lowest address.

Big Endian - Stores MSB (Most Significant Byte) in highest address.

Answer:

/* Function returns whether the computer system is Little or Big Endian*/

bool IsLittleEndian()
{
       int TestNumber = 1;
       char * ptr;

       ptr = (char *) &TestNumber;

       return (*ptr);    //True if little Endian.
}

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