1 #include <stdio.h>

     2 

     3 main()

     4 {

     5 

     6   int n, count = 1;

     7   float x, sum = 0,average;

     8   do {

     9     printf("how many numbers? ");

    10     scanf("%d", &n);

    11     sum = 0;

    12     count = 1;

    13     while (count <= n)   {

    14       printf("x = ");

    15       printf("\n(to end program, enter 0 for x): ");

    16       scanf("%f", &x);

    17       if (x == 0) 

    18         break;

    19       sum += x;

    20       ++count;

    21     }

    22     average = sum/n;

    23     printf("\nthe average is %f\n", average);

    24   } while (x != 0); 

    25 }

    26 

    27