# include <stdio.h>
# include <stdlib.h>

// Information about the students
typedef struct{
	int ID;
	char Answers[10];
	int Score;
	char LetterGRade;
} Student_Info;


// Information about the class
typedef struct{
	char AnswerKey[10];
	double average;
} Course_Info;


// Calculate a student's score given his answers and the answer key
int CalcScore (char StudentAnswers[10], char AnswerKey[10]){
	int i;
	int grade=0;

	for (i=0;i<10;i++)
		if (StudentAnswers[i]==AnswerKey[i])
			grade++;

	return grade;
}



void main(void){
	Student_Info MyStudents[20];	// Maximum of 20 students
	Course_Info EECE1207;
	FILE *fp;
	int NumStudents=0,i;

	EECE1207.average=0.0;		// Initialize class average;
	// Open file for reading
	fp=fopen("grades.txt","r");
	if (fp==NULL){
		printf("Could not open file for reading\n");
		exit(0);
	}

	// First read the answer key
	fscanf(fp,"%s",EECE1207.AnswerKey);
	
	while (!feof(fp)){
		fscanf(fp,"%d%s", &(MyStudents[NumStudents].ID),MyStudents[NumStudents].Answers);
		MyStudents[NumStudents].Score=CalcScore(MyStudents[NumStudents].Answers,EECE1207.AnswerKey);
		EECE1207.average+= MyStudents[NumStudents].Score;
		NumStudents++;
	}
	EECE1207.average /= NumStudents;

	printf("Class average is %f\n\n",EECE1207.average);
	printf("%-10s %-15s %-10s\n","ID","Score","Letter");
	printf("-----------------------------------\n");
	

	for (i=0;i<NumStudents;i++){
		if (MyStudents[i].Score > EECE1207.average)
			printf("%-10d %-15d %-10s\n",MyStudents[i].ID,MyStudents[i].Score,"PASS");
		else
			printf("%-10d %-15d %-10s\n",MyStudents[i].ID,MyStudents[i].Score,"FAIL");
	}


	fclose(fp);
}