Teach Yourself Borland C++ in 14 Days - portal

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18 Day 1 NOTE NOTE In C++Builder (as well as in Borland C++ 5.0), bool is a true data type. Some C++ compilers have a BOOL keyword, but bool is not a data type in those compilers. In those cases BOOL is a typedef that makes the BOOL equivalent to an int. A typedef in effect sets up an alias so that the compiler can equate one symbol with another. A typedef looks like this: typedef int BOOL; This tells the compiler, “BOOL is another word for int.” Only the double and float data types use floating-point numbers (numbers with decimal places). The other data types deal only with integer values. Although it’s legal to assign a value containing a decimal fraction to an integer data type, the fractional amount will be discarded and only the whole-number portion will be assigned to the integer variable. For example, int x = 3.75; will result in x containing a value of 3. Note that the resulting integer value is not rounded to the nearest whole number; rather, the decimal fraction is discarded altogether. By the way, you’d be surprised how few times you need floating-point numbers in most Windows programs. C++ will perform conversion between different data types when possible. Take the following code snippet for an example: short result; long num1 = 200; long num2 = 200; result = num1 * num2; In this case I am trying to assign the result of multiplying two long integers to a short integer. Even though this formula mixes two data types, C++ is able to perform a conversion. Would you like to take a guess at the result of this calculation? You may be surprised to find out that the result is -25,536. This is due to wrapping. If you look at Table 1.1, you’ll see that a short can have a maximum value of 32,767. What happens if you take a short with a value of 32,767 and add 1 to it? You will end up with a value of -32,768. This is essentially the same as the odometer on a car turning over from 99,999 to 00,000 when you drive that last mile. To illustrate, type in and run the program contained in Listing 1.3.
Listing 1.3. WRAPME.CPP. Getting Your Feet Wet 1: #include 2: #include 3: #pragma hdrstop 4: 5: int main(int argc, char **argv) 6: { 7: short x = 32767; 8: cout
Page 1 and 2: At a Glance At A Glance WEEK 1 In W
Page 3 and 4: Day 1 Getting Your Feet Wet Week Ge
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Page 13 and 14: NOTE Getting Your Feet Wet In C++,
Page 15 and 16: Getting Your Feet Wet An object, li
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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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NOTE Up to Your Neck in C++ Now you
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Up to Your Neck in C++ If you are a
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NOTE Up to Your Neck in C++ If you
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Up to Your Neck in C++ Now the comp
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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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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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TIP Creating Applications in C++Bui
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Summary Creating Applications in C+
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More on Projects Day 10 More on Pro
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More on Projects The only time this
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TIP More on Projects You can add mo
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More on Projects Table 10.1. The Pr
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Figure 10.6. The Project Explorer s
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■ Forms ■ Application ■ C++
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NOTE NOTE More on Projects if (!Abo
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Figure 10.9. The C++ page of the Pr
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NOTE TIP More on Projects To avoid
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NOTE More on Projects Compiler and
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More on Projects The Show warnings
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More on Projects The C++Builder Cod
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NOTE More on Projects If you open a
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More on Projects menu or press Ctrl
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Figure 10.13. The Code Editor with
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More on Projects find a matching br
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More on Projects The Editor Page Th
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NOTE More on Projects I usually get
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Quiz More on Projects Q When I star
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More on Projects 8. Continuing with
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Using the Debugger Day 11 Using the
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Using the Debugger Item Shortcut De
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NOTE Using the Debugger is highligh
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NOTE Using the Debugger any conditi
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Using the Debugger Conditional Brea
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Using the Debugger The variable nam
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Using the Debugger The Watch List i
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NOTE Using the Debugger in the Eval
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CPU View Using the Debugger The CPU
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Using the Debugger macros, TRACE an
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C++Builder Database Architecture Da
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C++Builder Database Architecture
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Building Internet Applications Day
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Building Internet Applications Tabl
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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++ __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 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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