# include <stdio.h>

typedef struct{
	double G1;
	double G2;
	double Average;
	char LetterGrade;
} StudentInfo;


double Ave(double x, double y){
	return (x+y)/2.0;
}


char SetGrade(StudentInfo student){
	char Letter;

	if (student.Average>90.0)
		Letter = 'A';
	else if (student.Average > 80.0)
		Letter = 'B';
	else if (student.Average > 70.0)
		Letter = 'C';
	else if (student.Average > 60.0)
		Letter = 'D';
	else
		Letter = 'F';

	return Letter;
}


void main(void){
	StudentInfo Souleymane;

	Souleymane.G1 = 80.0;
	Souleymane.G2 = 90.0;

	Souleymane.Average = Ave( Souleymane.G1, Souleymane.G2 );

	Souleymane.LetterGrade = SetGrade(Souleymane);

	printf("Average is %f\n",Souleymane.Average);
	printf("Letter grade is %c\n",Souleymane.LetterGrade);
}