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   ► KBProgrammingC++C++/CLIC++/CLI Lang...   Print This     
  From the November 2009 Issue of Prestwood eMag
 
C++/CLI Language Basics:
C++/CLI String Concatenation (+)
 
Posted 15 years ago on 2/17/2009
C++ Code Snippet:
 A flashcard from our C++ Flashcards Library
 A code snippet from our C++ Code Snippets Page

KB101922

C++/CLI String Concatenation

C++/CLI performs implicit casting of numbers to strings. To concatenate two strings, a string to an integer, or a string to a floating point number, use the + operator. For example, to convert a floating point number to a string just concatenate an empty string to the number as in "" + 3.2.

Alternatively, you can use the System.Text.StringBuilder class which frequently but not always provides faster code.

Syntax Example:
//Implicit casting of numbers.
//
//This fails:
//MessageBox::Show(3.3);
//
//This works:
MessageBox::Show("" + 3.3);

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Code Contributed By Mike Prestwood:

Mike Prestwood is a drummer, an author, and creator of the PrestwoodBoards online community. He is the President & CEO of Prestwood IT Solutions. Prestwood IT provides Coding, Website, and Computer Tech services. Mike has authored 6 computer books and over 1,200 articles. As a drummer, he maintains play-drums.com and has authored 3 drum books. If you have a project you wish to discuss with Mike, you can send him a private message through his PrestwoodBoards home page or call him 9AM to 4PM PST at 916-726-5675 x205.

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Linked Certification Question(s)

The following are practice certification questions with answers highlighted. These questions were prepared by Mike Prestwood and are intended to stress an important aspect of this KB post. All our practice questions are intended to prepare you generally for passing any certification test as well as prepare you for professional work.

Beginner

1 Beginner Level Question

Question #1: True or False?

C++/CLI supports implicit casting which allows you to use the + operator to concatenate strings and numbers as in the following line of code:

MessageBox::Show("I am " + 42 + " years old.");
Answer:
  • True
  • False

  •  KB Article #101922 Counter
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