I need to copy string, but it doesn't work

Question

I need to copy piece to piece1 But I've got an error uninitialized local variable piece1 used

char* piece = strtok(mp[rech], " ");
while (piece != NULL) { 
    char* piece1;
    strcpy(piece1, piece);
    piece = _strrev(piece);
    printf("%s ", piece1);
    printf("%s ", piece);
    piece = strtok(NULL, " ");
}

Answer 1

• Code passes uninitialized pointer to strcpy() resulting in undefined behavior (UB).

   char* piece1; strcpy(piece1, piece); // Value in pointer piece1 is not valid

• Tip: enable all warnings. Receive something like

  warning: 'piece1' is used uninitialized [-Wuninitialized]

Answer 2

I think you can use:

while (*piece1++ = *piece++);

You are going through the entire string and coping it to piece1 I had to do a similar thing and this should work