ex1b3.c File Reference

Appfs Exercise 1: use of subroutines. More...

#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "nums.h"

Go to the source code of this file.

Functions
int	main (int argc, char **argv)
	Program to read a file with binary positive 32 bit integers, sort the numbers and print them sorted. More...

Detailed Description

Author

Thorsten Koch

Date

18Oct2014

gcc -O3 -Wall -std=c99 -o ex1b3 ex1b3.c nums.c

Use stream file for input

Definition in file ex1b3.c.

Function Documentation

int main	(	int	argc,
		char **	argv
	)

Actually, the numbers are not sorted. There is an array with one bit for each possible number. Upon reading the respective bit is set for the number recognized. At the end the array is scanned in order and the numbers present are printed.

Parameters

argv	[1] name of file to read

Definition at line 24 of file ex1b3.c.

{
   const char* usage = "usage: %s filename\n";

   /* Check arguments, we need a filename.
    */
   if (argc < 2)
   {
      fprintf(stderr, usage, argv[0]);
      exit(EXIT_FAILURE);
   }

   /* we assume 32 bit integers, otherwise it will not work
    */
   assert(sizeof(int) == 4);
   
   NUMS* nsp = nums_read(argv[1]);

   if (NULL == nsp)
      return EXIT_FAILURE;

   fprintf(stderr, "Total numbers read = %zu\n", nums_used(nsp));

   nums_print(nsp);
   
   nums_free(nsp);
   
   return EXIT_SUCCESS;
}