{
"cells": [
{
"cell_type": "markdown",
"id": "3fcdae59",
"metadata": {},
"source": [
"# eval\n",
"\n",
"\n",
"\n",
"\n",
"**Author:** Rene Brun \n",
"This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Tuesday, May 19, 2026 at 08:36 PM."
]
},
{
"cell_type": "code",
"execution_count": 1,
"id": "76495efd",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:36:59.734464Z",
"iopub.status.busy": "2026-05-19T20:36:59.734281Z",
"iopub.status.idle": "2026-05-19T20:37:00.238829Z",
"shell.execute_reply": "2026-05-19T20:37:00.229671Z"
}
},
"outputs": [],
"source": [
"TCanvas *c1 = new TCanvas(\"c1\");\n",
"c1->Range(0, 0, 20, 10);\n",
"TPaveLabel *pt1 = new TPaveLabel(0.2, 4, 3, 6, \"Eval\");\n",
"pt1->SetTextSize(0.5);\n",
"pt1->SetFillColor(42);\n",
"pt1->Draw();\n",
"TPaveText *pt2 = new TPaveText(4.5, 4, 7.8, 6);\n",
"pt2->Draw();\n",
"TText *t1 = pt2->AddText(\"Read Operator\");\n",
"TText *t2 = pt2->AddText(\"number i\");\n",
"TPaveText *pt3 = new TPaveText(9, 3.5, 17.5, 6.5);\n",
"TText *t4 = pt3->AddText(\"Apply Operator to current stack values\");\n",
"TText *t5 = pt3->AddText(\"Example: if operator +\");\n",
"TText *t6 = pt3->AddText(\"value[i] += value[i-1]\");\n",
"t4->SetTextAlign(22);\n",
"t5->SetTextAlign(22);\n",
"t6->SetTextAlign(22);\n",
"t5->SetTextColor(4);\n",
"t6->SetTextColor(2);\n",
"pt3->Draw();\n",
"TPaveLabel *pt4 = new TPaveLabel(4, 0.5, 12, 2.5, \"return result = value[i]\");\n",
"pt4->Draw();\n",
"TArrow *ar1 = new TArrow(6, 4, 6, 2.7, 0.02, \"|>\");\n",
"ar1->Draw();\n",
"TText *t7 = new TText(6.56, 2.7, \"if i = number of stack elements\");\n",
"t7->SetTextSize(0.04);\n",
"t7->Draw();\n",
"ar1->DrawArrow(6, 8, 6, 6.2, 0.02, \"|>\");\n",
"TLine *l1 = new TLine(12, 6.6, 12, 8);\n",
"l1->Draw();\n",
"l1->DrawLine(12, 8, 6, 8);\n",
"ar1->DrawArrow(3, 5, 4.4, 5, 0.02, \"|>\");\n",
"ar1->DrawArrow(7.8, 5, 8.9, 5, 0.02, \"|>\");"
]
},
{
"cell_type": "markdown",
"id": "2a713d24",
"metadata": {},
"source": [
"Draw all canvases "
]
},
{
"cell_type": "code",
"execution_count": 2,
"id": "189c4122",
"metadata": {
"collapsed": false,
"execution": {
"iopub.execute_input": "2026-05-19T20:37:00.255290Z",
"iopub.status.busy": "2026-05-19T20:37:00.255103Z",
"iopub.status.idle": "2026-05-19T20:37:00.491117Z",
"shell.execute_reply": "2026-05-19T20:37:00.489090Z"
}
},
"outputs": [
{
"data": {
"text/html": [
"\n",
"\n",
"\n",
"
\n",
"\n",
"\n",
"\n"
],
"text/plain": [
""
]
},
"metadata": {},
"output_type": "display_data"
}
],
"source": [
"%jsroot on\n",
"gROOT->GetListOfCanvases()->Draw()"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "ROOT C++",
"language": "c++",
"name": "root"
},
"language_info": {
"codemirror_mode": "text/x-c++src",
"file_extension": ".C",
"mimetype": " text/x-c++src",
"name": "c++"
}
},
"nbformat": 4,
"nbformat_minor": 5
}