Russian Qt Forum

C++ (Qt)
#include <iostream>
using namespace std;
 
int main() {
	int arr[20];
	cout << sizeof(arr) / sizeof(int);
	return 0;
}
 

C++ (Qt)
int a = 10,
     b = 20;
int* mas = new int[a][b];
 

C++ (Qt)
    int a = 10,
        b = 20;
    int** mas = new int*[a];
    for (int i = 0; i < a; i++)
    {
        mas[i] = new int[b];
    }
 

C++ (Qt)
#include <vector>
#include <iostream>
 
using namespace std;
typedef vector<int> ivec;
 
int main()
{
	vector<ivec>mas(10, ivec(20));
	mas[0][0] = 0;
	mas[0][1] = 5;
 
	cout << mas[0][0] << " " << mas[0][1];
 
	return 0;
}

C++ (Qt)
#include <QVector>
#include <QDebug>
 
typedef QVector<int> ivec;
 
int main()
{
    int a = 10,
        b = 20;
    QVector<ivec>mas(a, ivec(b));
    mas[0][0] = 0;
    mas[0][1] = 5;
 
    qDebug() << mas[0][0] << " " << mas[0][1];
 
    return 0;
}
 

C++ (Qt)
template <class T>
using rubber_array2d = std::map<int, std::map<int, T>>;
 
rubber_array2d<int> array;
array[0][0] = 1;
array[0][1] = 3;
// и т.д..
 

C++ (Qt)
Qmap<int, Qmap<int, int> > a;

C++ (Qt)
Qmap<int, Qmap<int, int> > a;

C++ (Qt)
for (int i = 0; i < numRow; ++i)
 for (int j = 0; j < numCol; ++j)
  arr[i][j] = 0;