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  1. #include <stdio.h>
  2.  
  3. char calculateGrade(int score) 
  4. {
  5.     // Score thresholds for each grade
  6. 	if (score < 0 || score > 100) 
  7. 	{
  8.         return ('I'); 
  9.     } 
  10.  
  11. 	else if (score >= 90 && score <= 100) 
  12. 	{
  13.         return ('A');
  14.     } 
  15.  
  16. 	else if (score >= 80 && score <= 89) 
  17. 	{
  18.         return ('B');
  19.     } 
  20.  
  21. 	else if (score >= 70 && score <= 79) 
  22. 	{
  23.         return ('C');
  24.     } 
  25.  
  26. 	else if (score >= 60 && score <= 69) 
  27. 	{
  28.         return ('D');
  29.     } 
  30.  
  31. 	else 
  32. 	{
  33.         return ('F');
  34.     }
  35. }
  36.  
  37. int main() {
  38.     int score;
  39.     printf("Enter the test score: ");
  40.     scanf("%d", &score);
  41.  
  42.     char grade = calculateGrade(score);
  43.     if (grade == 'I') {
  44.         printf("Invalid score!\n");
  45.     } else {
  46.         printf("Grade: %c\n", grade);
  47.     }
  48.  
  49.     return 0;
  50. }
  51.  
Success #stdin #stdout 0s 5308KB
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Enter the test score: Grade: B
https://ideone.com/MtyhsK
language:
C (gcc 8.3)
created:
10 days ago
visibility:
public

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