Exer6

#include

#include
float grade, average, items, sum;

void main(){

clrscr();

average=0;sum=0;do{

printf("Enter grade (-1 to exit): ");

scanf("%f", &grade);if((grade!=-1)&&(grade<=100)){items++; sum=sum+grade;}}

while(grade!=-1);
average=sum/items;

printf("Class Average: %.2f\n", average);
if((average>=95)&&(average<=100)){ printf("Rating: A");} else if((average>=90)&&(average<=94)){ printf("Rating: B");} else if((average>=85)&&(average<=89)){ printf("Rating: C");} else if((average>=80)&&(average<=84)){ printf("Rating: D");} else if((average>=75)&&(average<=79)){ printf("Rating: E");}else if(average<=74){ printf("Rating: FAILED"); } getch();

}