Teach Yourself Borland C++ in 14 Days - portal

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26 Day 1 The main() Function NOTE A C++ program must have a main() function. This function serves as the entry point into the program. You have seen this in each of the sample programs you’ve seen thus far. Not all C++ programs have a traditional main() function, however. Windows programs written in C and C++ have an entry-point function called WinMain() rather than the traditional main() function. A C++Builder GUI application has a WinMain(), but it is hidden from you. C++Builder frees you from having to worry about the low-level details of a Windows program and allows you to concentrate on creating the user interface and the remainder of the program. main() is a function like any other function. That is, it has the same basic anatomy. You already saw that for a 32-bit console application C++Builder creates a default main() function with the following prototype: int main(int argc, char** argv); This form of main() takes two parameters and returns an integer value. As you learned earlier, you pass values to a function when you call the function. In the case of main(), though, you never call the function directly—it’s automatically executed when the program runs. So how does the main() function get its parameters? The answer: From the command line. Let me illustrate. Let’s assume that you have a Win32 console application that you execute from a DOS prompt with the following command line: grep WM_KILLFOCUS -d -i In this case you are starting a program called grep with command-line arguments of WM_KILLFOCUS, -d, and -i. Given that example, let me show you how that translates to argc and argv inside the main() function. First of all, the integer variable argc will contain the number of parameters passed in the command line. This will always be at least 1 because the program name counts as a parameter. The variable argv is an array of pointers to strings. This array will contain each string passed in the command line. For this code example, the following are true: argv contains 4 argc[0] contains c:\bc5\bin\grep.com argc[1] contains WM_KILLFOCUS argc[2] contains -d argc[3] contains -i
Getting Your Feet Wet Let’s prove that this works with a little sample program. Create a new console application in C++Builder and enter the program shown in Listing 1.5. Listing 1.5. ARGSTEST.CPP. 1: #include 2: #include 3: #pragma hdrstop 4: 5: int main(int argc, char **argv) 6: { 7: cout
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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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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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VCL Components As such, they go wit
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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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Figure 9.4. The Object Repository c
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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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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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Figure 10.9. The C++ page of the Pr
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NOTE TIP More on Projects To avoid
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More on Projects The C++Builder Cod
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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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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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Using the Debugger Conditional Brea
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CPU View Using the Debugger The CPU
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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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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 3 Day 4 Answers to Quiz Questio
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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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Cascade( ), 198 Close( ), 198 Close
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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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