Comparing Qt C++, C-Sharp and Visual Basic

Comments

Hamishwillee - Not sure how useful this is

Hi Girish

I've added some links to other comparative articles in a SeeAlso. I think that these are more likely to be useful than this article itself because they are a lot more complete. In addition they cover the essential differences and similarities in the language "philosophy", which I find most useful when starting to learn a new language. I'd also suggest that Qt developers are going to find VB a relatively unlikely new language to learn, so concentrating on just Qt and C#might be more useful.

Anyway, something to think about.

Regards

Hamish

hamishwillee 07:02, 20 February 2012 (EET)

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This article provides a comparative overview of programming languages used on Nokia Platforms: C# and Visual Basic (Windows Phone), and Qt C++(Symbian and MeeGo).

See Also

• Comparison Between C++ and C#
• C# vs. C++ (David's Blog)
• C++ vs. C# - a Checklist from a C++ Programmers Point of View
• A Comparative Overview of C#
• Comparison of C Sharp and Visual Basic .NET (wikipedia)

Article Metadata

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Article

Created: girishpadia (15 Oct 2011)

Updated: girishpadia (15 Oct 2011)

Last edited: hamishwillee (30 Nov 2012)

Comments

Visual Basic

    'This line is commented

C#

// This line is commented
 
/* This line block is 
Commented */

Qt C++ (same as for C#)

// This line is commented
 
/* This line block is 
commented */

Data Types

Visual Basic

 Boolean
 Byte, SByte
 Char
 Short, UShort, INTEGER, UInteger, LONG, ULong
 SINGLE, DOUBLE
 Decimal

C#

 bool
 byte, sbyte
 char
 short, ushort, int, uint, long, ulong
 float, double
 decimal

Qt

 bool
 char
 short
 int
 long
 float
 double

Variale declarations

Visual Basic

 DIM <variable name> AS <datatype> = [<default Value>]
 FOR example
 DIM TotalAmount AS LONG=123456

C#

 <datatype> <variable name> = [<default value>]
 // example
 long Totalamount = 123456

Qt

 <datatype> <variable name> = [<default value>]
 // Example
 long Totalamount = 123456

Condition statements

Visual Basic

IF <expression> THEN
  'Do something
ELSEIF <expression> THEN
  'Do something
ELSE
  'Do something
END IF

C#

if (<expression>)      
  {
  // do something if expression is true
  }
elseif(<expression>)
  {
  // do something if expression is true
  }
else
  {
  // do something if expression is false
  }

Qt

if (<expression>)      
  {
  // do something if expression is true
  }
else if(<expression>)
  {
  // do something if expression is true
  }
else
  {
  // do something if expression is false
  }

Switch

Visual Basic

 SELECT CASE <data>
     CASE <value1>
         'Do something
    CASE <value2>
        'Do something
    CASE ELSE
        'Do something if non of above case matched
    END SELECT

C#

switch (data)
{
case <value1>:
  //Do something
  break;
case <value2>:
  //do something
  break;
default:
  //do something if non of obove case matched.
  break;
}

Qt

switch (data)
  {
  case <value1>:
       //Do something
       break;
  case <value2>:
      //do something
      break;
  default:
      //do something if non of obove case matched.
      break;
  }

Loops

Visual Basic

 WHILE <expression>
   'do something
 END WHILE
 
 DO WHILE <expression>
   'do something
 LOOP
 
 DO UNTIL <expression>
    'do something
 LOOP
 
 FOR <variable>=<startValue> TO <endValue> STEP <increments>
      'do something
 NEXT

C#

while (<expression>)
{
      // do something
}
do
{
      // do something
}while(expression);
for(<variable>=<startValue>;<expression>;<increment>)
{
      // do something
}

Qt

while (<expression>)
{
      // do something
}
for(<variable>=<startValue>;<expression>;<increment>)
{
      // do something
}

Exception handling

Visual Basic

  Try
      'do something
  catch ex AS Exception
      'do something
  END Try

C#

  try
  {
       // do something
  }
  catch (Exception ex)
  {
       //do something
  }

Qt

  try
  {
     // do something
  }
  catch (e)
  {
     //do something
  }