Make a grading system using C++

Question

1. user will enter max marks.
2. will enter number of subjects.
3. marks for each subject.
4. grade will be shown for each individual subject.
5. save all entries in a file.
6. each time same file concatenated for new data.

Answer 1

Not bad, I would like to see it, when you finish making it.

Answer 2

Share the code.
We will help you to get it working and remove the errors.

Answer 3

Yes, you closed the file after writing the first entry. Move the line - fin.close(); outside the for loop, and thats it.

Answer 4

Its quite simple.
All you need to do is make a class, and write the entire object every time to a file opened in append mode.

Like this:

class Student {
// Methods to read and write.
};
void Write(string name, Student& s)
{
fstream file(name.c_str(), ios::out | ios::binary | ios::app);
file.write(reinterpret_cast<char*>(&s), sizeof(s));
file.close();
}

Answer 5

@Guy Anonymous
You create a single student, and save its data to a file.
Now what is the error? Are you not able to see all the subject data in the file or you wanted to write data of more students?

Answer 6

I made one but.
it's not working as I thought it should work.

Answer 7

yes exactly.
not able to see all data.
just I can see only one block data.
like if I enter no of sub = 5 then it should show all 5 sub data.
but only shows one subject data in file .

I think any looping error ;_;

Answer 8

🤔🤔 oh yeah.

thanks for your help 😊😊 @Kinshuk Vasisht

Answer 9

I can do that

Answer 10

correct this please.
when I run this code in my compiler.
it just save only one entry not all n entries.
thanks
https://code.sololearn.com/cC7afn5jqHjU/?ref=app