/* a C program about interesting numbers
  Author: Lin Jensen
  Date:	  22 Jan 2016
*/
#include	<stdio.h>	//preprocessor directives
#define		LENGTH	5

/* global variables can go here */  

int  interesting[LENGTH] = {7, 11, 42, 0, 1729};  // array of integers
char hello[] = "hello world";			  // array of characters

int main () {		// main program
  float average;	// local variables
  int sum = 0;
  int i;
  
  puts(hello);		// put a string to output
  // loop through an array
  i = 0;	//index of first element
  while (i < LENGTH)
  { sum = sum + interesting[i];
    i++;			// i=i+1, go on to next number
  }
  average = sum;		// converts to float
  printf("%f\n",average);
  average = average/LENGTH;
  printf ("sum = %d, average = %f\n", sum, average);
  
  hello[5] = 'W';
  puts (hello);
  interesting[5] = 65;		// new values
  puts (hello);
  
  return 0;			// normal termination
}	// end of main