c1a
Subj : Re: directly inputting numbers
To   : borland.public.cpp.borlandcpp
From : "Ed Mulroy [TeamB]" <ed@mulroyREMOVETHESECHARS.org>
Date : Wed Jul 16 2003 10:10 pm

To convert a string to a number with atoi you have to terminate the string
with a character of value of binary zero (a value of '\0').

Assume that your input is a set of 7, 4-digit numbers without delimiters
that are read into a string and are destined to be placed into an array.
Here is a little program which creates a file with that kind of data then
reads it in.  It does not use a comma, space or other delimiter to separate
the numbers.  You didn't say if you were working with C or C++ so I wrote it
as C (but it will also work as C++).

Try it, see that it works.  It is one way to do what you asked.

-------------------------
#include <stdio.h>

const char testfile_name[] = "testfile.dat";

int ReadTestFile(void)
  {
  char buffer[32]; /* deliberately made too big */
  char  c;
  int  i;
  int  iposition;
  int data[7];
  FILE *fin = fopen(testfile_name, "r");

  if (fin == NULL)
      {
      printf("Error opening test file\n");
      return 0;
      }

  fread(buffer, 7 * 4, 1, fin);

  for (i = iposition = 0; i < 7; ++i, iposition += 4)
      {
      /* save the next num's char */
      c = buffer[iposition + 4];

      /* terminate the string */
      buffer[iposition + 4] = '\0';

      /* read the number into the array */
      sscanf(buffer + iposition, "%d", &data[i]);
      /*  or you could have done it this way   */
      /*  itoa(buffer + iposition, *data[i]);  */

      /* restore the next num's char */
      buffer[iposition + 4] = c;
      }

  fclose(fin);

  /* write the data that was read from the file */
  printf("Data read from the file\n");

  for (i = 0; i < 7; ++i)
      {
      printf("Item %d  %d\n", i, data[i]);
      }

  return 1;
  }

int CreateTestFile(void)
  {
  const char test_data[] = "1111222233334444555566667777";

  FILE *fout = fopen(testfile_name, "w");

  if (fout != NULL)
    {
    fwrite(test_data, 28, 1, fout);
    fclose(fout);
    return 1;
    }

  return 0;
  }

int main()
  {
  if (!CreateTestFile())
    {
    printf("Error creating test file\n");
    return 1;
    }

  ReadTestFile();
  return 0;
  }
-------------------------
..
You could have converted it in other ways.  For instance, this will convert
4 character digits into a number.


-------------------------
  char *p = test_data; /* test_data from the program above */
  int i;
  int result = 0;

  for (i = 0; i < 4; ++i)
    {
    result = (result * 10) + (test_data[i] - '0');
    }
-------------------------

..  Ed

> Michael Fruchter wrote in message
> news:3f15bd8e$1@newsgroups.borland.com...
>
> Is there a way to directly input a number from a non-delimited
> text as opposed to reading in a certain amount of characters
> using "fgets" and converting to an integer using "atoi" (and
> then, if necessary, dividing by 10^x for x decimal places)?

.

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