89 lines
1.9 KiB
C++
89 lines
1.9 KiB
C++
#include <iostream>
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#include <vector>
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#include <list>
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#include "grid.h"
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using namespace std;
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void printArray(int numbers[]);
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void printArray(int numbers[], size_t count);
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int main()
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{
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// C arrays
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int numbers[10];
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for (size_t i = 0; i < 10; i++)
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{
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numbers[i] = 0;
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}
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int numbers2[] = { 0, 1, 2, 3, 4 };
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int numbers3[10] = { 0, 1, 2, 3, 4 };
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numbers[0] = 10;
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cout << "numbers[5]: " << numbers[5] << endl;
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// 2D array - 10 columns, 5 rows
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int grid[COLUMNS * ROWS] = {};
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grid[calculateIndex(3, 2)] = 10; // 4th column, 3rd row
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// size has to be always constant
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const int count = 10;
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int numbers4[count] = {};
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int length = sizeof(numbers) / sizeof(numbers[0]); // works only with local constant sized arrays
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for (size_t i = 0; i < size(numbers); i++) // works only with local constant sized arrays, but it is safer than sizeof
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{
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cout << numbers[i] << " ";
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}
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cout << endl;
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printArray(numbers);
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printArray(numbers, size(numbers));
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// "dynamic" (...) arrays
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// stl collections
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vector<int> numbers5;
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vector<int> numbers6 = { 0, 1, 2, 3, 4 };
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numbers5.push_back(10); // add an item at the end
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numbers5.pop_back(); // remove the last item
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numbers6[1] *= 2;
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vector<int> numbers7;
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numbers7.reserve(100);
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numbers7.shrink_to_fit();
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printArray(numbers6.data(), numbers6.size());
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list<int> numbersList;
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numbersList.push_back(10);
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numbersList.push_front(0);
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//numbersList[0] = 5; // random access is not available for lists
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return 0;
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}
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void printArray(int numbers[])
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{
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int length = sizeof(numbers) / sizeof(numbers[0]); // works not outside of the local scope
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cout << "sizeof(numbers): " << sizeof(numbers) << endl;
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//for (size_t i = 0; i < size(numbers); i++) // size is not working outside of the local scope
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//{
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// cout << numbers[i] << " ";
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//}
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//cout << endl;
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}
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void printArray(int numbers[], size_t count)
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{
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for (size_t i = 0; i < count; i++)
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{
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cout << numbers[i] << " ";
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}
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cout << endl;
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}
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