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  1. #include <stdio.h>
  2.  
  3. void letter();
  4.  
  5. int average;
  6.  
  7. int main()
  8. {
  9.     int a[100], i, sum = 0, num, lowest, test;
  10.  
  11.     printf("Enter the numbers of tests: ");
  12.     scanf("%d", &test);
  13.  
  14.     while (test > 100 || test <= 0)
  15.     {
  16.         printf("Error! The number of tests should be in range of (1 to 100).\n");
  17.         printf("Enter the number again: ");
  18.         scanf("%d", &test);
  19.     }
  20.  
  21.     for(i = 0; i < test; ++i)
  22.     {
  23.         printf("%d. Enter grade for this test: ", i+1);
  24.         scanf("%d", &a[i]);
  25.         sum += a[i];
  26.     }
  27.  
  28.     lowest = a[0];
  29.  
  30.     for (i = 0; i < num; i++)
  31.     {
  32.         if (a[i] < lowest)
  33.         {
  34.             lowest = a[i];
  35.         }
  36.     }
  37.  
  38.     average = sum / test;
  39.     printf("Average = %d\n", average);
  40.     letter();   //added call to letter()
  41.  
  42.    return (0);
  43. }
  44.  
  45. void letter()
  46. {
  47.     if (average == 0 || average <= 60)
  48.     {
  49.         printf("Your average is a F. \n");
  50.     }
  51.  
  52.     else if (average <= 70 || average >= 61)
  53.     {
  54.         printf("Your average is a D. \n");
  55.     }
  56.  
  57.     else if (average <= 80 || average >= 71)
  58.     {
  59.         printf("Your average is a C. \n");
  60.     }
  61.  
  62.     else if (average <= 90 || average >= 81)
  63.     {
  64.         printf("Your average is a B. \n");
  65.     }
  66.  
  67.     else if (average <= 100 || average >= 91)
  68.     {
  69.         printf("Your average is a A. \n");
  70.     }
  71. }
Success #stdin #stdout 0s 9424KB
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stdout
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Enter the numbers of tests: 1. Enter grade for this test: 2. Enter grade for this test: Average = 61
Your average is a D.
https://ideone.com/5IroTd
language:
C (gcc 8.3)
created:
5 years ago
visibility:
public

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