/* Problem: This program initializes an array with all cells 
filled with the same value (0.0 in this example) */

#include <stdio.h>
#define SIZE 100 /* size of the array */
#define VALUE 0.0

int 
main (void)
{

	double x[SIZE];
	int i;

	/* initializing the array with the same value */
	for (i=0; i<SIZE; ++i)
		x[i] = VALUE;


	/* printing the array for verification */
	for (i=0; i<SIZE; ++i)
		printf ("%5.1lf", x[i]);

	return (0);
}
 

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preprocessor directives | variable declarations
main function | helper functions | user-defined structures
comments

  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0 0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0  0.0