All Categories : C/C++

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- Project 2 -
Analyzing Visual C++ Programs

In this lesson, you learned about the fundamental format of all C++ programs. You saw the following:

• Visual C++ programs contain a main() function.
  
  
• Braces determine where the main() function begins and ends.
  
  
• Preprocessor directives direct the way Visual C++ compiles your program. Preprocessor directives always begin with a pound sign, #. The #include directive includes files needed by library functions.
  
  
• Visual C++ comments begin with // and end at the end of the line. Comments are for people, not for Visual C++.
  
  
• The cout command outputs data to your screen.
  
  
• All characters are important in Visual C++ programs.
  
  

Project 2 Listing. Introduction to Visual C++ programs.

1:  // Filename: PROJECT2.CPP

2:  // Introduces the format of Visual C++ programs and demonstrates

3:  // how to write Visual C++ comments, the #include preprocessor

4:  // directive, and the cout command that outputs data to the

5:  // screen.

6:

7:  #include <iostream.h>

8:

9:  void main()

10:  {

11:    cout << "I have a ";

12:    cout << "Sleekster";       // Continues the output line

13:    cout << " automobile.";    

14:    cout << endl << endl;      // Prints 2 blank lines

15:

16:    cout << "I want to sell my car for $4800 (cheap!)." << endl;

17:    cout << "I have had the car for " << 5 << " years." << endl;

18:    cout << "It's really a grade-" << 'A' << " deal!"

19:         << endl << endl;

20:

21:    return;  // End the program

22:  }

Description

1: A Visual C++ comment that includes the program's filename.

2: A comment that begins the introduction of the program's description.

3: The program's description continues.

4: The program's description continues.

5: The program's description continues.

6: Extra blanks make your program more readable.

7: The cout command needs information in the IOSTREAM.H header file.

8: Extra blanks make your program more readable.

9: All functions have names and the first function in all Visual C++ programs is main().

10: All functions begin with a left brace.

11: The screen output begins.

12: The car's model name prints. No new line occurs.

13: Finish the output.

14: Move the cursor down two lines.

15: Extra blanks make your program more readable.

16: Another message prints.

17: cout prints all kinds of data. Strings and an integer output here.

18: This cout outputs strings and a character literal.

19: Statements can be more than one line.

20: Extra blanks make your program more readable.

21: The final return; in main() always returns control back to Visual C++'s QuickWin window

22: A closing brace always terminates the main() function.

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7: The compiler inserts a helpful file here.

10: void means that main() does not return a value to the operating system.

14: endl sends a new line command to the screen.

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Output

I have a Sleekster automobile.

I want to sell my car for $4800 (cheap!).

I have had the car for 5 years.

It's really a grade-A deal!

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