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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <math.h>
  4.  
  5. int main(void)
  6. {
  7. 	float ExamValue;
  8. 	int StudentID;
  9. 	float sum;
  10. 	int exams;
  11. 	float average;
  12.  
  13. 	printf("Enter Student ID or -1 to quit.");
  14. 	scanf("%d", &StudentID);
  15.  
  16. 	while (StudentID != -1)
  17. 	{
  18. 		if (StudentID > 0)
  19. 		{
  20. 			sum = 0;
  21. 			for (exams=0; exams < 3; exams++)
  22. 			{
  23. 				printf ("Enter exam grade: \n");
  24. 				scanf ("%f", &ExamValue);
  25. 				sum += ExamValue;
  26. 			}
  27. 		}
  28. 		average = (float)sum/3.0;
  29. 		printf("The average is = %4.2f, Student ID: %d\n", average, StudentID);
  30. 		printf("Enter Student ID or -1 to quit.");
  31. 		scanf("%d", &StudentID);
  32.  
  33. 	}
  34.  
  35. 	return 0;
  36.  
  37. }
Success #stdin #stdout 0s 2160KB
comments (?)
stdin
copy 
12345
100.0
89.5
76.4
67890
98.7
46.2
89.4
-1
stdout
copy 
Enter Student ID or -1 to quit.Enter exam grade: 
Enter exam grade: 
Enter exam grade: 
The average is = 88.63, Student ID: 12345
Enter Student ID or -1 to quit.Enter exam grade: 
Enter exam grade: 
Enter exam grade: 
The average is = 78.10, Student ID: 67890
Enter Student ID or -1 to quit.
https://ideone.com/ge74Ej
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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