Lecture01

Lecture01

• 1.
  Lecture 01 Introduction to Programming Techniques
• 2.
  What are theProgram Organizing Techniques ? There are four different techniques, they are
• 3.
  Unstructured Programming Working: Main programdirectly operates on global data. Impractical when the program gets large. The same statement sequence must be copied if it is needed at different places. …. EG: for (I=1;I<=10;I++) ….. cout << ‘*’; DIS : Program becomes large …..
• 4.
  Structured Programming (Procedural Programming) main program procedure Main ( ) { add( ); subtract ( ); } Add ( ) Combine a sequence of statements into a procedure with calls and returns. { ……} Subtract( ) { …..}
• 5.
  Structured Programming (cont.) Main program coordinates calls to procedures and hands over appropriate data as parameters.
• 6.
  Modular Programming Procedures ofa common functionality are grouped together into separate modules. Main program coordinates calls to procedures in separate modules and hands over appropriate data as parameters.
• 7.
  Problems with Structuredand Modular Programming Unrestricted access to global data. Poor modeling of the real world. (Attributes and behavior are separated - data and methods are separated) Can’t create new data type easily.
• 8.
  Object-Oriented Programming • Combinedata and functions into object. (Member Data & Member Functions) • Member functions are also called methods. • Member data are hidden within member functions. • Data Encapsulation & Data Hiding. • Objects interact by sending messages to each other.
• 9.
  Object-Oriented Programming (cont.) • Object-Oriented Model