Help me to remove error from this code!!

Question

https://code.sololearn.com/ctjr8gkFjeee/?ref=app

Answer 1

check if this is the result you intended for:
https://code.sololearn.com/cddhqy3nAq8y/#c

Answer 2

[No of students]
[Rollno]
[Name]
[College name]
[Score]

Answer 3

I guess i asked wrong question actually i want to sort the record merit wise

Answer 4

I c thnks