When should I inline a member function and when should I use member initializers?

My code is below.. I would like to modify it so I could make use some inline when appropriate and member initializers:

#include "Books.h"

Book::Book(){
  nm = (char*)"";
  thck = 0;
  wght = 0;
}

Book::Book(const char *name, int thickness, int weight){
  nm =  strdup(name);
  thck = thickness;
  wght = weight;
}

Book::~Book(){

}

const char* Book::name(){
 return nm;
}

int Book::thickness(){
 return thck;
}

int Book::weight(){
 return wght;
}

//
// Prints information about the book using this format:
// "%s (%d mm, %d dg)\n"
//
void Book::print(){
  printf("%s (%d mm, %d dg)\n", nm, thck, wght);
}


Bookcase::Bookcase(int id){
 my_id = id;
 no_shelf = 0;
}

int Bookcase::id(){
 return my_id;
}

Bookcase::~Bookcase(){
  for (int i = 0; i < no_shelf; i++)
    delete my_shelf[i];
}

bool Bookcase::addShelf(int width, int capacity){
  if(no_shelf == 10)
    return false;
  else{
    my_shelf[no_shelf] = new Shelf(width, capacity);
    no_shelf++;
    return true;
  }
}

bool Bookcase::add(Book *bp){
 int index = -1;
 int temp_space = -1;
 for (int i = 0; i < no_shelf; i++){
    if (bp->weight() + my_shelf[i]->curCapacity() <= my_shelf[i]->capacity()){
       if (bp->thickness() + my_shelf[i]->curWidth() <= my_shelf[i]->width() && temp_space < (my_shelf[i]->width() - my_shelf[i]->curWidth())){
        temp_space = (my_shelf[i]->width()- my_shelf[i]->curWidth());
        index = i;
          }
    }
 }

 if (index != -1){
    my_shelf[index]->add(bp);
    return true;
 }else
    return false;

}

void Bookcase::print(){
 printf("Bookcase #%d\n", my_id);
 for (int i = 0; i < no_shelf; i++){
    printf("--- Shelf (%d mm, %d dg) ---\n", my_shelf[i]->width(), my_shelf[i]->capacity());
    my_shelf[i]->print();
 }
}