/*
  file-write.c   demonstrates the following:
              - use of argc and argv[]
	      - FILE * type
	      - stderr
	      - fopen(), fclose()
	      - fprintf()

   prints a sequence of numbers in text format with line breaks between 
   each number
*/

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
    FILE *outFile;
    char c;

    if (argc != 2)
    {
	fprintf(stderr, "\nusage: executable output-file.\n");
	exit(1);
    }

    if ((outFile = fopen(argv[1], "w")) == NULL)
    {
	fprintf(stderr, "Can't open %s for output\n", argv[1]);
	exit(1);
    }

    for (c = 60; c < 70 ; c++)
	fprintf(outFile, "%d\n", c); /* format as decimal integer, not char */

    fclose(outFile);

    return 0;
}