Teach Yourself Borland C++ in 14 Days - portal

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398 Day 11 As you step through the program, the execution point is highlighted in blue and the editor window gutter displays a black arrow glyph. Understand that the line highlighted in blue has not yet been executed but will be executed when program execution resumes. Once you have stopped at a breakpoint, you can view variables, view the call stack, browse symbols, or step through your code. After you have inspected any variables and objects, you can resume normal program execution by clicking the Run button. Your application will again run normally until the next breakpoint is encountered. NOTE It’s common to detect coding errors in your program after you have stopped at a breakpoint. If you change your source code in the middle of a debugging session and then choose Run to resume program execution, the IDE will prompt you with a message box asking whether you want to rebuild the source code. If you choose Yes, the current process will be terminated, the source code will be recompiled, and the program will be restarted. The problem with this approach is that your program does not get a chance to close normally, and any resources currently in use might not be freed properly, which could result in memory leaks. While Windows 95 and Windows NT handle resource leaks better than 16-bit Windows, it is still advisable to terminate the program normally and then recompile. The Breakpoint List Window The C++Builder IDE keeps track of the breakpoints you have set in the Breakpoint list window. To view the breakpoint list, choose View | Breakpoints from the main menu. The Breakpoint list window will be displayed, as shown in Figure 11.2. Figure 11.2. The Breakpoint list window. The Breakpoint list window has four columns. The first column, Filename, shows the filename of the source code unit in which the breakpoint is set. The second column, labeled Line, shows the line number on which the breakpoint is set. The Condition column shows
NOTE Using the Debugger any conditions that have been set for the breakpoint, and the Pass column shows the pass count condition that has been set for the breakpoint. (Breakpoint conditions and pass count conditions are discussed later, in the section “Conditional Breakpoints.”) You can size the columns by dragging the dividing line between two columns in the column header. The Pass column does not show the number of times the breakpoint has been hit; it only shows the pass condition that you have set for the breakpoint. The Breakpoint list window actually has two speed menus. Table 11.3 lists the speed menu items you will see if you click the right mouse button while over the Filename column. I will refer to this as the window’s primary speed menu. Table 11.3. The primary Breakpoint list speed menu. Item Description Enable Enables or disables the breakpoint. When a breakpoint is disabled, its glyph is grayed out in the Breakpoint list window. In the source window the breakpoint glyph is also grayed, and the breakpoint line is highlighted in green to indicate that the breakpoint is disabled. Delete Removes the breakpoint. View Source Scrolls the source file in the Code Editor to display the source line containing the breakpoint. (The breakpoint list retains focus.) Edit Source Places the edit cursor on the line in the source file where the breakpoint is set and switches focus to the Code Editor. Properties Displays the Edit breakpoint dialog box. TIP To quickly edit the source code line on which a breakpoint is set, double-click on the breakpoint in the Filename column of the Breakpoint list window. This is the same as choosing Edit Source from the Breakpoint list speed menu. The secondary speed menu can be displayed by clicking the right mouse button while the cursor is over any part of the Breakpoint list window except in the Filename column. This speed menu has items called Add, Delete All, Disable All, and Enable All. These items are self-explanatory, so I won’t bother to comment on them. 399 11
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At a Glance At A Glance WEEK 1 In W
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Day 1 Getting Your Feet Wet Week Ge
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Getting Your Feet Wet are divided i
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NOTE Getting Your Feet Wet As you m
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Getting Your Feet Wet but you need
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NOTE Getting Your Feet Wet In order
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NOTE Getting Your Feet Wet In C++,
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Getting Your Feet Wet An object, li
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Getting Your Feet Wet In some progr
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Listing 1.3. WRAPME.CPP. Getting Yo
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Getting Your Feet Wet Operator Desc
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NEW TERM Figure 1.5. Anatomy of a f
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SYNTAX ▼ ▲ Getting Your Feet We
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Getting Your Feet Wet Let’s prove
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Getting Your Feet Wet There is a sh
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Getting Your Feet Wet When the prog
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NOTE Function Description Getting Y
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NOTE Getting Your Feet Wet numbers
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Quiz Getting Your Feet Wet Windows
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Day 2 Wading In Deeper Wading In De
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NOTE Wading In Deeper If the condit
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SYNTAX ▼ ▼ TIP TIP Wading In De
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SYNTAX Wading In Deeper immediately
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Listing 2.1. FORLOOP.CPP. Wading In
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SYNTAX ▼ ▲ SYNTAX ▼ ▲ The w
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Wading In Deeper for (int i=0;i
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▲ default: dflt_statements; break
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Wading In Deeper This code generate
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NOTE Wading In Deeper You can creat
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Wading In Deeper So how do the sour
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Wading In Deeper 20: sizeof(listArr
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NOTE Wading In Deeper The displayRe
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Workshop Wading In Deeper The Works
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Day 3 Up to Your Neck in C++ Up to
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Up to Your Neck in C++ In this case
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Up to Your Neck in C++ Figure 3.1.
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Up to Your Neck in C++ That won’t
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Up to Your Neck in C++ 42: cin.getl
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Listing 3.2. REFERENC.CPP. Up to Yo
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Up to Your Neck in C++ Although it
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Up to Your Neck in C++ If you are a
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Up to Your Neck in C++ Now the comp
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NOTE Up to Your Neck in C++ int Air
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Quiz Up to Your Neck in C++ Day 5,
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Totally Immersed: C++ Classes and O
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NOTE Totally Immersed: C++ Classes
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C++ Class Frameworks and the Visual
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Figure 5.1. The Object Inspector wi
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NOTE C++ Class Frameworks and the V
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Exercises C++ Class Frameworks and
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The C++Builder IDE Explored: Projec
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NOTE The C++Builder IDE Explored: P
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TIP Figure 6.11. The About box with
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Figure 6.18. The About box for the
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Figure 6.20. The Project Options di
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Quiz The C++Builder IDE Explored: P
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Working with the Form Designer and
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NOTE Working with the Form Designer
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NOTE TIP TIP Working with the Form
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NOTE Figure 7.10. The Alignment Pal
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Quiz Working with the Form Designer
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In Review In Review WEEK 1 You cove
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In Review displayed based on user i
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At a Glance At A Glance WEEK 2 Are
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Day 8 VCL Components VCL Components
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VCL Components C++Builder displays
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VCL Components Important Common Pro
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Cursors VCL Components The Cursor p
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Figure 8.2. The Object Inspector sh
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VCL Components You can set this pro
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VCL Components Method Description I
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VCL Components Similarly, when the
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NOTE TIP VCL Components There may b
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VCL Components or load the Memo wit
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VCL Components Item Applies To Desc
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VCL Components You can use owner-dr
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VCL Components Property Applies To
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VCL Components for buttons that are
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VCL Components property set to true
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NOTE VCL Components To set the glyp
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VCL Components The GroupIndex Prope
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NOTE VCL Components form. Like the
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VCL Components As such, they go wit
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VCL Components The File Open and Fi
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VCL Components The InitialDir Prope
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VCL Components The Font dialog box
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Quiz VCL Components Q I’m respond
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Day 9 Creating Applications in C++B
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Figure 9.1. The Object Repository w
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Creating Applications in C++Builder
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TIP Creating Applications in C++Bui
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NOTE NOTE Creating Applications in
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Figure 9.4. The Object Repository c
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NOTE Creating Applications in C++Bu
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TIP Creating Applications in C++Bui
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Method Function C++Builder Database
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TIP C++Builder Database Architectur
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Building Internet Applications Day
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Building Internet Applications Tabl
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Building Internet Applications prop
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Building Internet Applications 20:
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Building Internet Applications 65:
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Quiz Building Internet Applications
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C++Builder Extensions to C++ Day 14
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C++Builder Extensions to C++ compil
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C++Builder Extensions to C++ Anothe
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C++Builder Extensions to C++ __int8
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C++Builder Extensions to C++ value
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C++Builder Extensions to C++ you ca
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In Review In Review WEEK 2 Wow, tha
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Answers to Quiz Questions APPENDIX
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Day 3 Day 4 Answers to Quiz Questio
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Answers to Quiz Questions 4. Hold d
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Day 10 Answers to Quiz Questions 1.
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Symbols & (ampersands), 246 © (cop
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C C (programming language), 132 C c
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File Save, 309-312 Find/Replace, 31
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Insert Template, 248 Object Reposit
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Cascade( ), 198 Close( ), 198 Close
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Layout property (BitBtn component),
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object-oriented programming, see OO
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protected member functions, 106 pro
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structures arrays, 58 C vs. C++, 64
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A V I A C O M S E R V I C E The Inf
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Component Palette Quick Reference S
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Add to Your Sams Library Today with
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Overview Introduction Introduction
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Introduction VCL Explored .........
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