Program doesn't execute anymore in Qt

[kantore]

Hello, I'm a beginner when it come to Qt and c++ and a few days ago I coded this program:

#include <QtWidgets/QApplication>
#include <QtWidgets/QWidget>
#include <QtWidgets/QHBoxLayout>
#include <QtWidgets/QVBoxLayout>
#include <QtWidgets/QPushButton>
#include <QtWidgets/QRadioButton>
#include <QtWidgets/QSlider>
#include <QtWidgets/QGroupBox>
#include <QtWidgets/QComboBox>
#include <QtWidgets/QLabel>
#include <QtWidgets/QMessageBox>
#include <QtGui/QPainter>
#include <QtGui/QScreen>
#include <QtDataVisualization/QAbstract3DGraph>
#include <Q3DSurface>
#include "matrix.h"

using namespace QtDataVisualization;

const float longueurBarre = 1.0f; //X
const float periode = 1500.0f; //Z
const int sampleCountX = 100;
const int nombrePasTemps = 10000;
const int sampleCountZ = 100;
const float k =406.0f;
const float rho = 10490.0f;
const float c=233.0f;
const double diffKelvin =273.15;

int main(int argc, char **argv)
{
    QApplication app(argc, argv);
    Q3DSurface *graph = new Q3DSurface();
    graph->setHorizontalAspectRatio(1.0);
    QWidget *container = QWidget::createWindowContainer(graph);

    if (!graph->hasContext()) {
        QMessageBox boiteMsg;
        boiteMsg.setText("Impossible d'initialiser le contexte OpenGL.");
        boiteMsg.exec();
        return -1;
    }

    QSize screenSize = graph->screen()->size();
    container->setMinimumSize(QSize(screenSize.width() / 2, screenSize.height() / 1.6));
    container->setMaximumSize(screenSize);
    container->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    container->setFocusPolicy(Qt::StrongFocus);

    QWidget *widget = new QWidget;
    QHBoxLayout *hLayout = new QHBoxLayout(widget);
    QVBoxLayout *vLayout = new QVBoxLayout();
    hLayout->addWidget(container, 1);
    hLayout->addLayout(vLayout);
    vLayout->setAlignment(Qt::AlignTop);

    widget->setWindowTitle(QStringLiteral("Méthode explicite : Evolution de la température interne d'une barre"));

    graph->setAxisX(new QValue3DAxis);
    graph->setAxisY(new QValue3DAxis);
    graph->setAxisZ(new QValue3DAxis);

    QSurfaceDataProxy *graphProxy = new QSurfaceDataProxy();
    QSurface3DSeries *graphSeries = new QSurface3DSeries(graphProxy);

    float stepX = (longueurBarre) / float(sampleCountX - 1);
    float stepZ = (periode) / float(sampleCountZ - 1);
    float pasTemps = (periode) / float(nombrePasTemps - 1);

    //MATRICE
    Matrix T(sampleCountX, nombrePasTemps);
    for(int i=0; i<sampleCountX; i++)
        T(i,0)=20-diffKelvin;
    for(int j=0; j<nombrePasTemps; j++)
        T(0,j)=50-diffKelvin;
    for(int j=0; j<nombrePasTemps; j++)
        T(sampleCountX - 1,j)=30-diffKelvin;

    for(int j=1; j<nombrePasTemps ; j++)
        for(int i=1; i<sampleCountX-1 ; i++)
            T(i,j)=T(i,j-1)+float((k*pasTemps)/(rho*c*stepX*stepX))*(T(i+1,j-1)-2*T(i,j-1)+T(i-1,j-1));

    for(int j=0; j<nombrePasTemps ; j++)
        for(int i=0; i<sampleCountX ; i++)
            T(i,j)+=diffKelvin; 
    //MATRICE

    QSurfaceDataArray *dataArray = new QSurfaceDataArray;
    dataArray->reserve(sampleCountZ);
    for (int i = 0 ; i < sampleCountZ ; i++) {
        QSurfaceDataRow *newRow = new QSurfaceDataRow(sampleCountX);
        float z = qMin(periode, (i * stepZ));
        int index = 0;
        for (int j = 0; j < sampleCountX; j++) {
            float x = qMin(longueurBarre, (j * stepX));
            float y =T(j,100*i);
            (*newRow)[index++].setPosition(QVector3D(x, y, z));
        }
        *dataArray << newRow;
    }

    graphProxy->resetArray(dataArray);

    graphSeries->setDrawMode(QSurface3DSeries::DrawSurfaceAndWireframe);
    graphSeries->setFlatShadingEnabled(true);

    QLinearGradient gradient(0, 0, 1, 100);
    gradient.setColorAt(1.0, Qt::darkGreen);
    gradient.setColorAt(0.5, Qt::yellow);
    gradient.setColorAt(0.2, Qt::red);
    gradient.setColorAt(0.0, Qt::darkRed);

    graph->seriesList().at(0)->setBaseGradient(gradient);
    graph->seriesList().at(0)->setColorStyle(Q3DTheme::ColorStyleRangeGradient);
    graph->axisX()->setLabelFormat("%.2f");
    graph->axisZ()->setLabelFormat("%.2f");
    graph->axisX()->setRange(0, longueurBarre);
    graph->axisY()->setRange(20.0f, 50.0f);
    graph->axisZ()->setRange(0, periode);
    graph->axisX()->setLabelAutoRotation(30);
    graph->axisY()->setLabelAutoRotation(90);
    graph->axisZ()->setLabelAutoRotation(30);
    graph->addSeries(graphSeries);

    graph->seriesList().at(0)->setBaseGradient(gradient);
    graph->seriesList().at(0)->setColorStyle(Q3DTheme::ColorStyleRangeGradient);

    widget->show();

    return app.exec();
}

It worked exactly as intended, and then I decided to hit build, the exe file didn't execute and said that it need dll files, so I put the needed dll files in the folder, they were : Qt5Datavizualisation.dll, Qt5Gui.dll, Qt5Core.dll, Qt5Widgets.dll, and the exe file still didn't execute.
So I try to execute it in Qt, and now the program don't work anymore. I tried to troubleshoot it by seeing if it can execute even a simple "Hello world" button but even that doesn't work.
Back to my original code now, it said that the failing module was icuin51.dll so I put that in the folder too, now it say that it's ntdll.dll that is the problem, and the exception code is c000007b.
I have no idea what the problem can be, it's really urgent, all I need is for it to work just once as I just need screenshot of the graph it display. If anyone could help me I would appreciate it greatly.

[ODБOï]

@kantore hi
you need to deploy your program

[kantore]

After a chat with LeLev I found out that the problem doesn't come from my code but Qt itself since I can't even execute a blank code, so I'm going to reinstall Qt.