How do I add the following functions to my code?

int checkCourseNumber ( int crn ); This function returns 0 if the passed crn isnt from the list of allowable crns. It returns 1 otherwise.

int getCreditHours ( int crn ) This function uses a switch structure and returns the number of credit hours that go with the passed crn. For instance getCreditHours (4599 ) returns 3

void printInvoiceLine ( int crn, int creditHours); This function, when called, prints something like:

4599 3 $360.75

if crn is 4599 and creditHours is 3. This function should be called at most two times because a student takes up to two courses.

void printInvoice ( int id, int crn1, int crn2 ); This function prints the fee invoice. Note that this function may call printInvoiceLine.

Here is my code:

#include int main(){ int courseId[2]; int studentId, numCourses, creditHours; int i; double FEE_PER_CREDIT_HOUR = 120.25; double HEALTH_ID_FEES = 35; double total_fees = 0, courseFee; char hyphen;

printf("Enter the students Id: \t"); scanf("%d", &studentId);

printf(" Enter how many courses taken(up to 2): \t"); scanf("%d", &numCourses); while(numCourses < 1 || numCourses > 2){ printf(" Invalid number of courses. "); printf("Please re-enter how many courses (up to 2): \t"); scanf("%d", &numCourses);

}

printf(" Enter the 2 course numbers separated by - : (like 2356-8954) \t"); scanf("%d", &courseId[0]); for(i = 1; i < numCourses; i++){ scanf("%c", &hyphen); scanf("%d", &courseId[1]); }

printf(" Thank you! "); printf("PRESS ANY KEY TO CONTINUE... "); getchar(); getchar();

printf(" \t\t\t VALENCE COMMUNITY COLLEGE"); printf(" \t\t\t ORLANDO FL 10101 ");

printf(" \t\t\t Fee Invoice Prepared for Student V%d ", studentId); printf(" \t\t\t 1 Credit Hour = $%.2f ", FEE_PER_CREDIT_HOUR); printf(" \t\t\t %-10s %-12s ","CRN", "CREDIT HOURS"); for(i = 0; i < numCourses; i++){ if(courseId[i] == 4587) creditHours = 4; else if(courseId[i] == 4599 || courseId[i] == 9696) creditHours = 3; else if(courseId[i] == 8997) creditHours = 1; else creditHours = 0; courseFee = creditHours * FEE_PER_CREDIT_HOUR; printf(" \t\t\t %-10d %-18d $ %6.2f ", courseId[i], creditHours, courseFee); total_fees += courseFee;

}

printf(" \t\t\t %-10s %-18s $ %6.2f ", " ", "Health & Id fees", HEALTH_ID_FEES); total_fees += HEALTH_ID_FEES; printf(" \t\t\t ------------------------------ ");

printf(" \t\t\t %-10s %-18s $ %6.2f ", " ", "Total Payments", total_fees);

}

how do I add the functions given and replace lines in my original code?