Part-3: C++, C#, Java Syntax Differences

Comments, Methods, Class, objects Syntax Differences

Comments Same for C++, C#, Java

1. Single line comments  - //
2. Multi line comments

/ This is a a multiline comment /

Method/Function declarations

Same, except that in C# and in Java, function must always be part of a class, and must prefix with access specifier - public/private/protected

check main function for reference

Class declarations

Same but c# and Java does not require a semicolon after closing bracket '}'

_ C++ _

class myMath {
  //Methods
  public: int Add(int i, int j)
  {
    return i + j;
  }
};

_ C#/Java _

 class myMath {
  //Methods
  public int Add(int i, int j)
  {
    return i + j;
  }
}

Object declaration/creation C++

Object creation on Stack

myMath obj; //on stack
int result = obj.Add(1,2);

Object creation on Heap

myMath \*pobj = new myMath(); //on heap
int result = obj->Add(1,2);
delete pobj;

Java/C#

myMath obj = new myMath();
int result = obj.Add(1,2);