int _tmain(int argc, _TCHAR* argv[])
{
time_t start_time;
time_t finish_time;
int eteration_count = 100000000000; // количество итераций
int a = 0; // левая граница интегрирования
int b = 1; // правая граница интегрирования
double x;
time(&start_time);
double step = (double)(b - a) / eteration_count;
double total = (liner(a) + liner(b))*step / 2;
for (int i = 0; i < eteration_count; ++i)
{
x = a + i* step;
total += liner(x)*step;
}
time(&finish_time);
std::cout << "Result is: " << total << " Operation time: " << difftime(finish_time, start_time) << std::endl;
return 0;
}
void SelfMenu::paintEvent(QPaintEvent *e)
{
QPainter painter(this);
// painte
QPainterPath path;
float h = this->height();
float w = this->width();
path.setFillRule(Qt::WindingFill);
path.addRoundedRect(QRect(0, 0, w, h), 3, 3);
painter.setRenderHint(QPainter::Antialiasing, true);
// LinearGradient
QLinearGradient liner(QPoint(0, 0), QPoint(w, h));
// 132, 216, 209 ю╤
// 47, 107, 117 д╛хо
// load data
ConfigureData *conf = ConfigureData::getInstance();
c1 = conf->getColorIni("color1");
c2 = conf->getColorIni("color2");
liner.setColorAt(0, c1);
liner.setColorAt(1, c2);
painter.fillPath(path, QBrush(liner));
painter.setPen(Qt::transparent);
painter.drawPath(path);
// draw some lines
QList<QPoint> line1;
QList<QPoint> line2;
{
// calc start, final point
float k = h / w;
int b[7];
int x1[7], x2[7];
b[0] = h /3;
b[1] = h /2;
b[2] = 2 * h / 3;
b[3] = 4 * h / 3;
b[4] = 3 * h / 2;
b[5] = 5 * h / 3;
b[6] = h;
x1[0] = w / 6;
x2[0] = w / 4;
x1[1] = w / 4;
x2[1] = 2 * w / 5;
x1[2] = w / 4;
x2[2] = 4 * w / 7;
x1[3] = w / 2;
x2[3] = 5 * w / 6;
x1[4] = 2 * w / 3;
x2[4] = 5 * w / 6;
x1[5] = 3 * w / 4;
x2[5] = 4 * w / 5;
x1[6] = w / 4;
x2[6] = 3 * w / 4;
for (int i = 0; i < 7; i++)
{
line1 << QPoint(x1[i], - k * x1[i] + b[i]);
line2 << QPoint(x2[i], - k * x2[i] + b[i]);
}
}
for (int i = 0; i < 7; i++)
{
QPoint p1 = line1.at(i);
QPoint p2 = line2.at(i);
QLinearGradient linecolor(p1, p2);
linecolor.setColorAt(0, QColor(220, 220, 220, 50));
linecolor.setColorAt(0.45, QColor(220, 220, 220, 150));
linecolor.setColorAt(0.55, QColor(220, 220, 220, 150));
linecolor.setColorAt(1, QColor(220, 220, 220, 50));
painter.setPen(QPen(QBrush(linecolor), 1));
painter.drawLine(p1, p2);
}
return QMenu::paintEvent(e);
}
