#include "TCanvas.h"
#include "TPad.h"
#include "TMultiGraph.h"
#include "TGraph.h"
#include "TGraphErrors.h"
#include "TAxis.h"
#include "TLegend.h"
#include "TLatex.h"
#include "TROOT.h"

#include <cstdlib>

void corona2() {
   gStyle->SetTimeOffset(0);
   TDatime T1(2020, 2, 24, 0, 0, 0);
   int X1 = T1.Convert();
   TDatime T2(2020, 3, 11, 0, 0, 0);
   int X2 = T2.Convert();

   const char *datain = "corona2.txt";

   TCanvas *c01 = new TCanvas("c01","multigraph",1280,1024);
   c01->SetGridx();

   float offx=1.3;
   float offy=1.7;
   float margr=0.08;
   float w=3;
   float margl=0.12;
   gPad->SetLeftMargin(margl);
   gPad->SetRightMargin(margr);

   TGraph *gamma = new TGraph();

   FILE *f = fopen(datain,"r");
   char line[80];
   int y,m,d,v,i=0,date;
   while (fgets(line,80,f)) {
      sscanf(&line[0] ,"%d",&y);
      sscanf(&line[5] ,"%d",&m);
      sscanf(&line[8] ,"%d",&d);
      sscanf(&line[11] ,"%d",&v);
      TDatime T(y, m, d, 0, 0, 0);
      date = T.Convert();
      gamma->SetPoint(i,date,v);
      i++;
   }
   fclose(f);



   gamma->SetMarkerColor(kRed);
   gamma->SetLineColor(kBlue);
   gamma->SetMarkerStyle(23);
   gamma->SetMarkerSize(2);
   gamma->SetLineWidth(10);

   gamma->Draw("ALP");

   gamma->GetXaxis()->SetTimeDisplay(1);

   gamma->SetTitle("Covid-19 cases");
   gamma->GetXaxis()->SetTitle("Day");
   gamma->GetYaxis()->SetTitle("Cases");
   gamma->GetYaxis()->SetTitleOffset(offy);
   gamma->GetXaxis()->SetTitleOffset(offx);
   gamma->GetXaxis()->SetLabelSize(0.02);
   gamma->GetXaxis()->SetNdivisions(30);
}