Binary files read/write syntax in C++ and the usage of classes or object in it

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can we use the name of the class instead of its object in the following syntax :

C++

student s;
fin.read((char*)&s,sizeof(s));

where s is the object of the class.
and student is the mane of the class

What I have tried:

Basically nothing,

Posted 4-Feb-18 23:09pm

Member 13661441

Updated 4-Feb-18 23:39pm

CPallini

v2

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Jochen Arndt 5-Feb-18 6:01am

You already got an answer to your question but you should be careful when reading and writing class contents as they are. That won't work if your class contains dynamic objects (pointers to allocated objects).

Richard MacCutchan 5-Feb-18 7:45am

Why not just try it, ans see what results you get?

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CPallini · Answer 1 · 2018-02-04T23:39:00

Solution 1

Yes you can.
The compiler happily accetps

C++

fin.read((char*)&s,sizeof(student));

As you may easily verify.

The form

C++

fin.read((char*)&s,sizeof(s));

however is more robust (if you change the type of s it remains correct).

Posted 4-Feb-18 23:39pm

CPallini

Updated 4-Feb-18 23:40pm

v2