// Illustrates pass by address with structures

#include <stdio.h>

struct student
{
     char fName[20];            // first name
     char lName[20];            // last name
     int socSecNumber;          // social security number
     double gpa;                // grade point average
};			

// some functions

void LoadStudentData(struct student* sp);
void PrintStudent(const struct student* sp);

int main()
{
  struct student sList[5];	// array of 5 students
  int i;

  for(i = 0; i < 5; i++)
  {
     printf("Entering data for student %d...\n", i+1);
     LoadStudentData(&sList[i]);
  }

  printf("\n\nPrinting student records\n\n");
  for (i = 0; i < 5; i++)
     PrintStudent(&sList[i]);

  return 0;
}

void LoadStudentData(struct student* sp)
{
  printf("Enter first name: ");
  gets(sp->fName);
  printf("Enter last name: ");
  gets(sp->lName);
  printf("Enter SSN: ");
  scanf(" %d", &(sp->socSecNumber) );
  printf("Enter GPA: ");
  scanf(" %lf", &(sp->gpa) );

  // consume remaining characters up through newline.
  while (getchar() != '\n')
	;
}

void PrintStudent(const struct student* sp)
// prints the internal data of any student structure passed in
{
  printf("%-20s %-20s  %10d   GPA:   %4.2f\n",
		sp->fName, sp->lName, sp->socSecNumber, sp->gpa);

}