Question

As the title says, in my program I (after many procedures) get tokenized words.
Unfortunately due to reversing them they hold punctuation characters at the beginning of a word eg. ,moose

How to move that , from the beginning to the end -> moose,

Up to now I’ve tried(ptr is char *):

temp = strdup(ptr);
temp = &ptr[0];
ptr[0] = ptr[1];
ptr[strlen(ptr)-1] = temp;
free(temp);

But that gives me errors:

assignment makes pointer from integer without a cast

warning: assignment makes integer from pointer without a cast

How to fix that?

Answer 1

Something like this:

void swap_last(char *str)
{
  const size_t len = strlen(str);
  if(len > 1)
  {
    const char   first = str[0];
    memmove(str, str + 1, len - 1);
    str[len - 1] = first;
  }
}

Note that the above assumes str to be valid.