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I want to to put in array some QString words but I don't know how can I do. I have try with Vector like this : 

int i = 10;
int j = 10;
QVector < QVector < QString> > tableau;
QString word = "Word";
tableau[i][j] = word;

But that don't work. This is the error message : 

ASSERT failure in QVector<T>::operator[]: "index out of range"

Ah have try with std::vector and std::string but this don't work to

So can you explain me how to create a string array of two dimensions to put word Thanks

Mathis Delaunay
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    You are creating a `QVector` which has a size and capacity of 0 - you first need to fill it with elements using `append` [official reference](http://doc.qt.io/qt-5/qvector.html#append) – UnholySheep Aug 17 '16 at 20:25

1 Answers1

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Assuming you are trying to create a table (for which QVector<QVector<T>> is not the best choice) you should initialize it first.

Something like:

QVector<QVector<QString>> CreateTableau(int sizeX, int sizeY)
{
   QVector<QVector<QString>> result;
   for (int idx1 = 0; idx1 < sizeX; idx1++)
   {
      result.append(QVector<QString>());
      for (int idx2 = 0; idx2 < sizeY; idx2++)
      {
         result[idx1].append(QString());
      } 
   }
   return result;
}

then you call it like:

int i = 10;
int j = 10;
QVector<QVector<QString>> tableau = CreateTableau(100, 100); //TODO: replace with appropriate sizes.
QString word = "Word";
tableau[i][j] = word;
bashis
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  • Someone help me and he give me this which work perfectly : QVector> tableur(QVector>(10,QVector(10,""))); tableur[1][1] = "Mmot"; qDebug() << tableur[1][1]; – Mathis Delaunay Aug 17 '16 at 21:30