add collections

CPlusPlus/Collections/main.cpp

@@ -0,0 +1,114 @@
+#include <iostream>
+#include <vector>
+#include <list>
+#include <algorithm>
+
+using namespace std;
+
+#define INT_LIST list<int> // simple text replacement
+
+// type definitions
+typedef list<int> IntegerList;
+typedef IntegerList::iterator IntListIterator;
+
+void printArray(int numbers[]);
+void printArray(int numbers[], int count);
+
+int main()
+{
+	// C Arrays
+	int numbers[10];
+
+	for (size_t i = 0; i < 10; i++)
+	{
+		numbers[i] = 0;
+	}
+	
+	numbers[0] = 10;
+
+	cout << "numbers[5]: " << numbers[5] << endl;
+
+	int numbers2[] = { 0, 1, 2, 3, 4, 5 };
+	int numbers3[10] = { 0, 1, 2, 3, 4, 5 };
+
+	// 2d array - 10 rows, 5 columns
+	int numbers4[10 * 5];
+	numbers4[3 + 7 * 5] = 10; // 3rd column, 7th row
+
+	// size have to be always const, except by using pointers
+	const int count = 10;
+	int numbers5[count];
+
+	int length = sizeof(numbers2) / sizeof(numbers2[0]); // works locally only
+	for (size_t i = 0; i < std::size(numbers2); i++) // size is working locally only
+	{
+		cout << numbers2[i] << " ";
+	}
+	cout << endl;
+
+	cout << "sizeof(numbers2): " << sizeof(numbers2) << endl;
+
+	printArray(numbers2);
+	printArray(numbers2, std::size(numbers2));
+
+	// stl collections
+	vector<int> numbers6;
+	vector<int> numbers7 = { 0, 1, 2, 3 };
+	numbers6.push_back(10); // add an item at the end
+	numbers6.pop_back(); // remove an item at the end
+	numbers7[2] *= 10;
+	vector<int> numbers8;
+	numbers8.reserve(100);
+	cout << "size of numbers8: " << numbers8.size() << endl;
+	cout << "capacity of numbers8: " << numbers8.capacity() << endl;
+	printArray(numbers7.data(), numbers7.size());
+
+	list<int> numbersList;
+	numbersList.push_back(10);
+	numbersList.push_front(100);
+	//numbersList[1] = 200; // random access is not available for lists
+	list<int>::iterator it = numbersList.begin();
+	for (; it != numbersList.end(); it++)
+	{
+		cout << *it << " ";
+	}
+	cout << endl;
+	numbersList.insert(--it, 20);
+	for (it = numbersList.begin(); it != numbersList.end(); it++)
+	{
+		cout << *it << " ";
+	}
+	cout << endl;
+
+	for (int n : numbersList)
+	{
+
+	}
+
+	for_each(numbers7.begin(), numbers7.end(), [](const int& n) {
+		cout << n << " ";
+	});
+
+	return 0;
+}
+
+void printArray(int numbers[])
+{
+	int length = sizeof(numbers) / sizeof(numbers[0]); // works not outside of local scope
+	cout << "sizeof(numbers2): " << sizeof(numbers) << endl;
+
+	//for (size_t i = 0; i < std::size(numbers); i++) // size is not working outside of local scope
+	//{
+	//	cout << numbers[i] << " ";
+	//}
+	//cout << endl;
+}
+
+void printArray(int numbers[], int count)
+{
+	for (size_t i = 0; i < count; i++)
+	{
+		cout << numbers[i] << " ";
+	}
+	cout << endl;
+}