I am beginner of c .. can someone answer this question ?

Question

Write a c program to ..
You are given two lists of register numbers. One list consists of Register numbers of all the students in a class and other list consists of students who have passed in the End semester exam. Find the list of students who failed in the End semester exam.

Answer 1

Take two array one for registration number and other for marks like this
Struct{

int register [20]//={"12,45,55,12}
int marks[20] //={90,23,67,32,85}
}stud[20];

Take inputs from user marks and registration number and check if marks is lower than 33 out of 100 then fail otherwise pass