int main()
{
	char initial = 'a';
	double aStu = 0, bStu = 0, cStu = 0, dStu = 0, fStu = 0, grade = 0, totGrade = 0, avgGrade = 0, totStu = 0;

	while (initial != 'Z') {
		printf("Please enter your initial ('Z' to quit): ");
		scanf("%c", &initial);
		getchar();
		printf("%c, please enter your numeric grade: ", initial);
		scanf_s("%lf", &grade);
		if (grade <= 100 && grade >= 90) {
			aStu++;
			totStu++;
			totGrade = (grade + totGrade);
			printf("%c, you got a A.\n", initial);
		}
		else if (grade < 90 && grade >= 80) {
			bStu++;
			totStu++;
			totGrade = (grade + totGrade);
			printf("%c, you got a B.\n", initial);
		}
		else if (grade < 80 && grade >= 70) {
			cStu++;
			totStu++;
			totGrade = (grade + totGrade);
			printf("%c, you got a C.\n", initial);
		}
		else if (grade < 70 && grade >= 60) {
			dStu++;
			totStu++;
			totGrade = (grade + totGrade);
			printf("%c, you got a D.\n", initial);
		}
		else if (grade < 60 && grade >= 0) {
			fStu++;
			totStu++;
			totGrade = (grade + totGrade);
			printf("%c, you got a F.\n", initial);
		}
		else if (grade > 100 || grade < 0); {
			printf("%c, that is an invalid grade.\n", initial);
		}
	}



	printf("You entered %.0lf students.\n", totStu);
	printf("The average numeric grade for the class is: %.0lf\n", avgGrade);
	printf("There were %.0lf A's.\n", aStu);
	printf("There were %.0lf B's.\n", bStu);
	printf("There were %.0lf C's.\n", cStu);
	printf("There were %.0lf D's.\n", dStu);
	printf("There were %.0lf F's.\n", fStu);

	return 0;
}