Help me!!! (Solved)

Question

Question:✓Write a c program to get 5 subject marks of n number of students and display the total marks rankwise.

Problem:✓How to create a dynamic array of structs of students and work with it!?

If you don't know the answer, please upvote it so that others can find it and answer

Answer 1

If you use C++, you can use container like std::vector:
std::vector<Students> arr;
or make pointer:
Students* arr = new Students[size];

There are more containers, check them here if you want:
https://www.cplusplus.com/reference/stl/

If you use C, make dynamic array with pointer:
Students* arr = (Students*)malloc(sizeof(Students)*size);

Btw it would be nice to see your attempt, or full content of the task.
In addition, you have completed only half of C course, so you did not face memory management problem yet. Continue learning so you'll solve your problem by yourself

Answer 2

Calvin Thomas did you do it yourself!? I understand only 60 percent of it. And it says "execution timed out" when I run it

Answer 3

Rishi Yes, I had done it myself, and the code is pretty straightforward in my opinion (I guess that the only part which appears vague at first sight is the bubble-sort loop).
As said previously, the code is pretty slow (due to all the reallocs and de-referencing) and thus, requires a fast and a stable internet connection to show the output. Try reducing the number of names to two, if it still bothers you.

Answer 4

Rishi ,it says execution timed out, cuz you have to type "Y" to break out of that infinite loop:
for (int i=0;1;i++)

Answer 5

If you are opting for C then (as already pointed by Michał Doruch ) you can use malloc() to allocate memory dynamically.

You have to keep track of size and just in case it overflows, you can create a new array dynamically of larger size and copy all of it's contents from previous array to the new one and delete the old one.

In C++, all this has already been implemented in standard library as vectors for you to use easily.

Answer 6

I tried it using these methods and solved it. Plus I already learnt a lotta C++, but now I have to learn C because of my college syllabus which makes no sense. Anyway, thank you 🙂

Answer 7

Rishi Here is a C code that does the mentioned job (using dynamic arrays):

https://code.sololearn.com/csxHsJzFsO8z/?ref=app

Answer 8

It says "oops something went wrong when I try to enter this link"

Answer 9

Rishi You may try this link:

https://code.sololearn.com/c4O6eidhbhAX/?ref=app