Take arguments and output whether it contains hyphen or not, and so on...

detect_hyphen1.c

/* Take arguments and output whether it contains hyphen or not. */
#include <stdio.h>

int
main (int   argc,
      char* argv[])
{
  int num;
  if (argc >= 1)
    num = argc;

  char* str[num];
  int idx_buf[num];
  int i;
  for (i = 0; i < num; i++)
  {
    str[i] = argv[i];
    idx_buf[i] = 0;
  }

  i = 0;
  while (num)
  {
    int j;
    for (j = 0; str[i] != '\0'; j++)
    {
      if (str[i][j] == '-')
      {
        idx_buf[i] = 1;
        i++;
        break;
      }
      else
      {
        idx_buf[i] = 2;
        i++;
        break;
      }
    }
    num--;
  }

  for (i = 0; idx_buf[i] != 0; i++)
  {
    int idx;
    if (idx_buf[i] == 1)
    {
      idx = i;
      printf ("argument %d has hyphen    : %s\n", i, str[idx]);
    }
    else if (idx_buf[i] == 2)
    {
      idx = i;
      printf ("argument %d has no hyphen : %s\n", i, str[idx]);
    }
  }

  return 0;
}                       

detect_hyphen2.c

/* Take arguments and output if it's after hyphen one. */

#include <stdio.h>

int
main (int   argc,
      char* argv[])
{
  int num;
  if (argc >= 1)
    num = argc;

  char* str[num];
  int idx_buf[num];
  int i;
  for (i = 0; i < num; i++)
  {
    str[i] = argv[i];
    idx_buf[i] = 0;
  }

  i = 0;
  while (num)
  {
    int j;
    for (j = 0; str[i] != '\0'; j++)
    {
      if (str[i][j] == '-')
      {
        idx_buf[i] = 1;
        i++;
        break;
      }
      else
      {
        idx_buf[i] = 2;
        i++;
        break;
      }
    }
    num--;
  }

  i = 1;
  while (idx_buf[i] != 0)
  {
    int idx;
    if (idx_buf[i] == 1)
    {
      i++;
      if (idx_buf[i] == 2)
      {
        idx = i;
        printf ("argument %d after hyphen: %s\n", i, str[idx]);
        i++;
        continue;
      }
    }
    else
      i++;
  }

  return 0;
}