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  1. // Question-9 Mixed Array
  2.  
  3. #include <stdio.h>
  4.  
  5. int mixed_prime(int m);
  6. float mixed_average(int a[], int m);
  7.  
  8. int main()
  9. {
  10.     int i, m, calc = 0;
  11.  
  12.     scanf("%d", &m);
  13.     int a[m];
  14.  
  15.     for (i = 0; i < m; i++)
  16.     {
  17.         scanf("%d ", &a[i]);
  18.     }
  19.     for (i = 0; i < m; i++)
  20.     {
  21.         int prime = mixed_prime(a[i]);
  22.         if (prime)
  23.             calc++;
  24.     }
  25.  
  26.     float avg = mixed_average(a, m);
  27.  
  28.     printf("Prime numbers: %d\n", calc);
  29.     printf("Average of all even integers: %.2f\n", avg);
  30.  
  31.     return 0;
  32. }
  33.  
  34. int mixed_prime(int m)
  35. {
  36.     int j;
  37.  
  38.     if (m == 1)
  39.         return 0;
  40.     else
  41.     {
  42.         for (j = 2; j <= m / 2; j++)
  43.         {
  44.             if (m % j == 0)
  45.                 return 0;
  46.         }
  47.         return 1;
  48.     }
  49. }
  50.  
  51. float mixed_average(int a[], int n)
  52. {
  53.     int k, sum = 0, flag = 0;
  54.     float average_sum;
  55.  
  56.     for (k = 0; k < n; k++)
  57.     {
  58.         if (a[k] % 2 == 0)
  59.         {
  60.             sum += a[k];
  61.             flag++;
  62.         }
  63.     }
  64.     average_sum = sum / flag;
  65.     return average_sum;
  66. }
Success #stdin #stdout 0s 5448KB
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stdin
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5
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stdout
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Prime numbers: 3
Average of all even integers: 8.00
https://ideone.com/ZQ6UsP
language:
C (gcc 8.3)
created:
1 year ago
visibility:
public

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