Example of a void Declaration

On line 7 of the following example, the function find_max is declared as having type void. Lines 15 through 26 contain the complete definition of find_max.

Note: The use of the sizeof operator in line 13 is a standard method of determining the number of elements in an array.

 1   /**
 2   ** Example of void type
 3   **/
 4   #include <stdio.h>
 5
 6   /* declaration of function find_max */
 7   extern void find_max(int x[ ], int j);
 8
 9   int main(void)
10   {
11      static int numbers[ ] = { 99, 54, -102, 89 };
12
13      find_max(numbers, (sizeof(numbers) / sizeof(numbers[0])));
14
15      return(0);
16   }
17
18   void find_max(int x[ ], int j)
19   { /* begin definition of function find_max */
20      int i, temp = x[0];
21
22      for (i = 1; i < j; i++)
23      {
24          if (x[i] > temp)
25             temp = x[i];
26      }
27      printf("max number = %d\n", temp);
28   } /* end definition of function find_max  */

void Type