3

Mean of the positive numbers input from the keyboard

  1. #include <stdio.h>
  2.  
  3. main() {
  4.     int n, count = 0, sum = 0;
  5.  
  6.     printf( "Enter a series of integers (end with 0):\n" );
  7.  
  8.     for ( ;; ) {
  9.         printf("%d: ", count+1);
  10.         scanf("%d", &n );
  11.         if ( n == 0 )
  12.             break;
  13.         if ( n < 0 )
  14.             continue;
  15.         sum += n;
  16.         ++count;
  17.     }
  18.     printf("The mean of the %d positive numbers is %f\n", count, (float)sum/count);
  19. }
$ gcc -o mean mean.c
$ ./mean
Enter a series of integers (end with 0):
1: 9
2: 3
3: -3
3: 6
4: 0
The mean of the 3 positive numbers is 6.000000

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