int main(void){
int numDays;
int i;
float sum = 0;
float dailyHigh;
float dailyLow;
char conditions;
float dailyAvg = 0;
printf("\nWeather Analyzer 2.0\n");
printf("=====================\n");
printf("\nHow many days of data? \n");
numDays = getInteger (1, 14);
for(i = 0; i < numDays; i++) {
getDailyData (&dailyHigh, &dailyLow, &conditions);
dailyAvg = average (dailyHigh, dailyLow);
printf("Today's average temperature is: %.2f\n", dailyAvg);
sum += dailyAvg;
draw(symbolToDraw(conditions, dailyAvg), 20);
}
displayResult (numDays, (sum/numDays));
return 0;
}
/// <summary>
/// Draw the chart according to user selection and display it in the ChartViewer.
/// </summary>
/// <param name="viewer">The ChartViewer object to display the chart.</param>
void CFinancedemoDlg::drawChart(CChartViewer *viewer)
{
// In this demo, we just assume we plot up to the latest time. So endDate is now.
double endDate = Chart::chartTime2((int)time(0));
// If the trading day has not yet started (before 9:30am), or if the end date is on
// on Sat or Sun, we set the end date to 4:00pm of the last trading day
while ((fmod(endDate, 86400) < 9 * 3600 + 30 * 60) ||
(Chart::getChartWeekDay(endDate) == 0)
|| (Chart::getChartWeekDay(endDate) == 6))
endDate = endDate - fmod(endDate, 86400) - 86400 + 16 * 3600;
// The duration selected by the user
int durationInDays = (int)_tcstol((const TCHAR *)m_TimeRange.GetItemDataPtr(
m_TimeRange.GetCurSel()), 0, 0);
// Compute the start date by subtracting the duration from the end date.
double startDate;
if (durationInDays >= 30)
{
// More or equal to 30 days - so we use months as the unit
int YMD = Chart::getChartYMD(endDate);
int startMonth = (YMD / 100) % 100 - durationInDays / 30;
int startYear = YMD / 10000;
while (startMonth < 1)
{
--startYear;
startMonth += 12;
}
startDate = Chart::chartTime(startYear, startMonth, 1);
}
else
{
// Less than 30 days - use day as the unit. The starting point of the axis is
// always at the start of the day (9:30am). Note that we use trading days, so
// we skip Sat and Sun in counting the days.
startDate = endDate - fmod(endDate, 86400) + 9 * 3600 + 30 * 60;
for (int i = 1; i < durationInDays; ++i)
{
if (Chart::getChartWeekDay(startDate) == 1)
startDate -= 3 * 86400;
else
startDate -= 86400;
}
}
// The first moving average period selected by the user.
CString avgText;
m_MovAvg1.GetWindowText(avgText);
m_avgPeriod1 = (int)_tcstol(avgText, 0, 0);
if (m_avgPeriod1 < 0)
m_avgPeriod1 = 0;
if (m_avgPeriod1 > 300)
m_avgPeriod1 = 300;
// The second moving average period selected by the user.
m_MovAvg2.GetWindowText(avgText);
m_avgPeriod2 = (int)_tcstol(avgText, 0, 0);
if (m_avgPeriod2 < 0)
m_avgPeriod2 = 0;
if (m_avgPeriod2 > 300)
m_avgPeriod2 = 300;
// We need extra leading data points in order to compute moving averages.
int extraPoints = (m_avgPeriod1 > m_avgPeriod2) ? m_avgPeriod1 : m_avgPeriod2;
if (extraPoints < 25)
extraPoints = 25;
// The data series we want to get.
CString tickerKey =
(const TCHAR *)m_TickerSymbol.GetItemDataPtr(m_TickerSymbol.GetCurSel());
// In this demo, we can get 15 min, daily, weekly or monthly data depending on
// the time range.
int resolution;
if (durationInDays <= 10)
{
// 10 days or less, we assume 15 minute data points are available
resolution = 900;
// We need to adjust the startDate backwards for the extraPoints. We assume
// 6.5 hours trading time per day, and 5 trading days per week.
double dataPointsPerDay = 6.5 * 3600 / resolution;
double adjustedStartDate = startDate - fmod(startDate, 86400) -
(int)(extraPoints / dataPointsPerDay * 7 / 5 + 2.9999999) * 86400;
// Get the required 15 min data
get15MinData(tickerKey, adjustedStartDate, endDate);
}
else if (durationInDays >= 4.5 * 360)
{
// 4 years or more - use monthly data points.
resolution = 30 * 86400;
// Adjust startDate backwards to cater for extraPoints
int YMD = Chart::getChartYMD(startDate);
int adjustedMonth = (YMD / 100) % 100 - extraPoints;
int adjustedYear = YMD / 10000;
while (adjustedMonth < 1)
{
--adjustedYear;
adjustedMonth += 12;
}
double adjustedStartDate = Chart::chartTime(adjustedYear, adjustedMonth, 1);
// Get the required monthly data
getMonthlyData(tickerKey, adjustedStartDate, endDate);
}
else if (durationInDays >= 1.5 * 360)
{
// 1 year or more - use weekly points.
resolution = 7 * 86400;
//Note that we need to add extra points by shifting the starting weeks backwards
double adjustedStartDate = startDate - (extraPoints * 7 + 6) * 86400;
// Get the required weekly data
getWeeklyData(tickerKey, adjustedStartDate, endDate);
}
else
{
// Default - use daily points
resolution = 86400;
// Adjust startDate backwards to cater for extraPoints. We multiply the days
// by 7/5 as we assume 1 week has 5 trading days.
double adjustedStartDate = startDate - fmod(startDate, 86400) -
((extraPoints * 7 + 4) / 5 + 2) * 86400;
// Get the required daily data
getDailyData(tickerKey, adjustedStartDate, endDate);
}
// We now confirm the actual number of extra points (data points that are before
// the start date) as inferred using actual data from the database.
for (extraPoints = 0; extraPoints < m_noOfPoints; ++extraPoints)
{
if (m_timeStamps[extraPoints] >= startDate)
break;
}
// Check if there is any valid data
if (extraPoints >= m_noOfPoints)
{
// No data - just display the no data message.
MultiChart errMsg(400, 50);
errMsg.addTitle(Chart::TopLeft, "No data available for the specified time period",
"arial.ttf", 10);
viewer->setChart(&errMsg);
return;
}
// In some finance chart presentation style, even if the data for the latest day
// is not fully available, the axis for the entire day will still be drawn, where
// no data will appear near the end of the axis.
int extraTrailingPoints = 0;
if (resolution <= 86400)
{
// Add extra points to the axis until it reaches the end of the day. The end
// of day is assumed to be 16:00 (it depends on the stock exchange).
double lastTime = m_timeStamps[m_noOfPoints - 1];
int extraTrailingPoints = (int)((16 * 3600 - fmod(lastTime, 86400)) / resolution);
if (extraTrailingPoints > 0)
{
double *extendedTimeStamps = new double[m_noOfPoints + extraTrailingPoints];
memcpy(extendedTimeStamps, m_timeStamps, sizeof(double) * m_noOfPoints);
for (int i = 0; i < extraTrailingPoints; ++i)
extendedTimeStamps[m_noOfPoints + i] = lastTime + resolution * (i + 1);
delete[] m_timeStamps;
m_timeStamps = extendedTimeStamps;
}
}
//
// At this stage, all data is available. We can draw the chart as according to
// user input.
//
//
// Determine the chart size. In this demo, user can select 4 different chart sizes.
// Default is the large chart size.
//
int width = 780;
int mainHeight = 250;
int indicatorHeight = 80;
CString selectedSize = (const TCHAR *)m_ChartSize.GetItemDataPtr(m_ChartSize.GetCurSel());
if (selectedSize == _T("S"))
{
// Small chart size
width = 450;
mainHeight = 160;
indicatorHeight = 60;
}
else if (selectedSize == _T("M"))
{
// Medium chart size
width = 620;
mainHeight = 210;
indicatorHeight = 65;
}
else if (selectedSize == _T("H"))
{
// Huge chart size
width = 1000;
mainHeight = 320;
indicatorHeight = 90;
}
// Create the chart object using the selected size
FinanceChart m(width);
// Set the data into the chart object
m.setData(DoubleArray(m_timeStamps, m_noOfPoints + extraTrailingPoints),
DoubleArray(m_highData, m_noOfPoints), DoubleArray(m_lowData, m_noOfPoints),
DoubleArray(m_openData, m_noOfPoints), DoubleArray(m_closeData, m_noOfPoints),
DoubleArray(m_volData, m_noOfPoints), extraPoints);
//
// We configure the title of the chart. In this demo chart design, we put the
// company name as the top line of the title with left alignment.
//
CString companyName;
m_TickerSymbol.GetLBText(m_TickerSymbol.GetCurSel(), companyName);
m.addPlotAreaTitle(Chart::TopLeft, TCHARtoUTF8(companyName));
// We displays the current date as well as the data resolution on the next line.
const char *resolutionText = "";
if (resolution == 30 * 86400)
resolutionText = "Monthly";
else if (resolution == 7 * 86400)
resolutionText = "Weekly";
else if (resolution == 86400)
resolutionText = "Daily";
else if (resolution == 900)
resolutionText = "15-min";
char buffer[1024];
sprintf(buffer, "<*font=arial.ttf,size=8*>%s - %s chart",
m.formatValue(Chart::chartTime2((int)time(0)), "mmm dd, yyyy"), resolutionText);
m.addPlotAreaTitle(Chart::BottomLeft, buffer);
// A copyright message at the bottom left corner the title area
m.addPlotAreaTitle(Chart::BottomRight,
"<*font=arial.ttf,size=8*>(c) Advanced Software Engineering");
//
// Set the grid style according to user preference. In this simple demo user
// interface, the user can enable/disable grid lines. The grid line colors are
// hard coded to 0xdddddd (light grey), and the plot area background color is
// hard coded to 0xfffff0 (pale yellow).
//
int vGridColor = m_VGrid.GetCheck() ? 0xdddddd : Chart::Transparent;
int hGridColor = m_HGrid.GetCheck() ? 0xdddddd : Chart::Transparent;
m.setPlotAreaStyle(0xfffff0, hGridColor, vGridColor, hGridColor, vGridColor);
//
// Set log or linear scale according to user preference
//
m.setLogScale(m_LogScale.GetCheck() != 0);
//
// Add the first techical indicator according. In this demo, we draw the first
// indicator on top of the main chart.
//
addIndicator(&m, (const TCHAR *)m_Indicator1.GetItemDataPtr(m_Indicator1.GetCurSel()),
indicatorHeight);
// Add the main chart
m.addMainChart(mainHeight);
//
// Draw the main chart depending on the chart type the user has selected
//
CString selectedType = (const TCHAR *)m_ChartType.GetItemDataPtr(m_ChartType.GetCurSel());
if (selectedType == _T("Close"))
m.addCloseLine(0x40);
else if (selectedType == _T("TP"))
m.addTypicalPrice(0x40);
else if (selectedType == _T("WC"))
m.addWeightedClose(0x40);
else if (selectedType == _T("Median"))
m.addMedianPrice(0x40);
//
// Add moving average lines.
//
addMovingAvg(&m, (const TCHAR *)m_AvgType1.GetItemDataPtr(m_AvgType1.GetCurSel()),
m_avgPeriod1, 0x663300);
addMovingAvg(&m, (const TCHAR *)m_AvgType2.GetItemDataPtr(m_AvgType2.GetCurSel()),
m_avgPeriod2, 0x9900ff);
//
// Draw the main chart if the user has selected CandleStick or OHLC. We
// draw it here to make sure it is drawn behind the moving average lines
// (that is, the moving average lines stay on top.)
//
if (selectedType == _T("CandleStick"))
m.addCandleStick(0x33ff33, 0xff3333);
else if (selectedType == _T("OHLC"))
m.addHLOC(0x8000, 0x800000);
//
// Add price band/channel/envelop to the chart according to user selection
//
CString selectedBand = (const TCHAR *)m_Band.GetItemDataPtr(m_Band.GetCurSel());
if (selectedBand == _T("BB"))
m.addBollingerBand(20, 2, 0x9999ff, 0xc06666ff);
else if (selectedBand == _T("DC"))
m.addDonchianChannel(20, 0x9999ff, 0xc06666ff);
else if (selectedBand == _T("Envelop"))
m.addEnvelop(20, 0.1, 0x9999ff, 0xc06666ff);
//
// Add volume bars to the main chart if necessary
//
if (m_Volume.GetCheck())
m.addVolBars(indicatorHeight, 0x99ff99, 0xff9999, 0xc0c0c0);
//
// Add additional indicators as according to user selection.
//
addIndicator(&m, (const TCHAR *)m_Indicator2.GetItemDataPtr(m_Indicator2.GetCurSel()),
indicatorHeight);
addIndicator(&m, (const TCHAR *)m_Indicator3.GetItemDataPtr(m_Indicator3.GetCurSel()),
indicatorHeight);
addIndicator(&m, (const TCHAR *)m_Indicator4.GetItemDataPtr(m_Indicator4.GetCurSel()),
indicatorHeight);
// Set the chart to the viewer
viewer->setChart(&m);
// Set image map (for tool tips) to the viewer
sprintf(buffer, "title='%s {value|G}'", m.getToolTipDateFormat());
viewer->setImageMap(m.getHTMLImageMap("", "", buffer));
}