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

int main(int argc, char *argv[])
{
  char buf[10];
  int *dim1, i, len;
  if (!argv[1] || 0 == (len=atoi(argv[1]))) {
    fprintf(stderr, "Usage: %s LENGTH\n(eg. %s 500)\n", argv[0], argv[0]);
    exit(0);
  }
  if (NULL  == (dim1=calloc(len, sizeof (int)))) {
    perror("memory ran out2\n");
    exit(1);
  }
  for (i=0; i<len; i++) {
    *(dim1+i) = i;
    printf("%d\r", dim1[i]);
  }
  puts("");
  if (NULL != dim1) {           /* ²òÊü */
    free(dim1); dim1 = NULL;
  }
}