categories.cpp

sdd5练习1-4答案

#include "Categories.h"

const int Categories::TOP_LEVEL = 0;
const int Categories::NO_PARENT = 0;

Category* Categories::operator [](const int &number) {
	vector<Category*>::iterator it = this->objects.begin();
	for (; it != this->objects.end(); it ++) {
		if ((*it)->getNumber() == number)
			return (*it);
	}
	return NULL;
}

void Categories::add(Category *ptr) {
	this->objects.push_back(ptr);
}

vector<Category*>::iterator Categories::begin() {
	return this->objects.begin();
}

vector<Category*>::iterator Categories::end() {
	return this->objects.end();
}