Answer:
The program in C is as follows:
#include <stdio.h>
char turn_to_letter(double score){
char lettergrade = 'A';
if(score>=80){ lettergrade = 'A'; }
else if(score>=70){ lettergrade = 'B'; }
else if(score>=60){ lettergrade = 'C'; }
else if(score>=50){ lettergrade = 'D'; }
else{lettergrade = 'F';}
return lettergrade;
}
int main(){
int midterm, final;
double score;
printf("Midterm: "); scanf("%d", &midterm);
printf("Final: "); scanf("%d", &final);
score = 0.4 * midterm + 0.6 * final;
printf("Score: %lf\n", score);
printf("Letter Grade: %c",turn_to_letter(score));
return 0;
}
Explanation:
The function begins here
char turn_to_letter(double score){
This initializes lettergrade to A
char lettergrade = 'A';
For scores above or equal to 80, grade is A
<em> if(score>=80){ lettergrade = 'A'; }</em>
For scores above or equal to 70, grade is B
<em> else if(score>=70){ lettergrade = 'B'; }</em>
For scores above or equal to 60, grade is C
<em> else if(score>=60){ lettergrade = 'C'; }</em>
For scores above or equal to 50, grade is D
<em> else if(score>=50){ lettergrade = 'D'; }</em>
Grade is F for other scores
<em> else{lettergrade = 'F';}</em>
This returns the letter grade
return lettergrade;
}
The main begins here
int main(){
This declares the midterm and final scores as integer
int midterm, final;
This declares the total score as double
double score;
These get input for midterm score
printf("Midterm: "); scanf("%d", &midterm);
These get input for final score
printf("Final: "); scanf("%d", &final);
This calculates the total score
score = 0.4 * midterm + 0.6 * final;
This prints the calculated total score
printf("Score: %lf\n", score);
This calls the turn_to_letter function and prints the returned letter grade
printf("Letter Grade: %c",turn_to_letter(score));
return 0;
}
