EXERCISES 5

#include
#include

void main()
{
clrscr();

float grade, average, sum, a=0

while (grade!=-1)
{
sum= sum + grade;
printf("Enter Grade;-1 to exit;");
scanf("% f, & grade);

if(grade = = -1){
printf("The average is %.2f \n", average = sum /a );)
a+ + ;}
if(average >= 95 && average < = 100){ printf("Rated A");} if (average > = 85 && average < = 94){ printf ("Rated B");} if (average >=75 && average < = 84){ printf ("Rated C");} if (average < = 74){ printf ("Failed");} getch(); }