# C programming language

my friend i fail to perform this simple task can you please direct me how to approach a simple question like this
the quetion said "a registrar set up the curriculum for the term . One course may have up to 10 subject . Students must select a minimum of 6 subjects from a particular course .Once a student registers for the term , the billing system is notified so that the student may be billed .Student may use the system to add or drop subjects for the period of time of registration.\
write a C program that will check the number of subject s the student has chosen for a course .This program will run after the student has updated the subject selection. If the number of subject is less than 6 then an appropriate message should be displayed on the screen . The program should include a function that will count the number of subjects.

int main (void) {
}