{}
#include <stdio.h>
char calculateGrade (float average){
if (average >=90)
return'A';
else if (average >=80)
return 'B';
else if (average >=70)
return 'C';
else
return'f';
}
int main(){
int subject,i;
float marks, total=0.0,avrage;
char grade;
printf("enter the num of subject");
scanf("%d",&subject);
for(i=0;i<subject;i++){
printf("enter the marks for subject %d:",i);
scanf("%f",&marks);
total+=marks;
}
avrage=total/subject;
grade=calculateGrade(avrage);
printf("\n avrage marks:%.2f\n",avrage);
printf("grade:%c\n",grade);
}