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Introduction to Programming Aideen nasirishargh

Tuesday, 8 st of Aban 2 nd TA Session. Introduction to Programming Aideen nasirishargh. Let’s start real coding!. In last session, we did: Met with Memory and CPU Met with C++ and compared it, somehow, w/ C and Java Met with editors and compilers. Suggested DevCpp .

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Introduction to Programming Aideen nasirishargh

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  1. Tuesday, 8stof Aban 2ndTA Session Introduction to Programming Aideen nasirishargh

  2. Let’s start real coding! • In last session, we did: • Met with Memory and CPU • Met with C++ and compared it, somehow, w/ C and Java • Met with editors and compilers. Suggested DevCpp. • Learnt how to run a “Hello World!” program and compile it! • In this session, we’re planned to: • What’s a program and how/who questions about its exec! • Meet with assignments and operators • Meet with if – The decision statement • While, as a repeating structure

  3. The story: This program works!

  4. How a program works • Algorithm! • What’s it? (water boiling sample!) • Computer is a logical machine and can hear only 0s and 1s, and nothing in the middle! • A computer Program • One ordered set of instructions to be executed one after another • They’ll be translated into assembly codes but we an consider them as is (i.e. complicated commands in one line!) • Each instruction: • Gives an info to machine (e.g. defining new variable) • Changes the status of the Machine (its memory, its running line) • Program Counter, a built-in variable for the program, • It’s auto-incremental

  5. Sequential statements • Samples: • Calculation of a math formula! • Swap! • How to improve it?! • Solving a 2nd order equation

  6. Is all running methods, top to bottom?! • How to skip one or more lines? • How to decide what to run, based on current state of machine (e.g. value of the variables) • Solution: if! • Let’s see an example… • Find equality • Find max, min • Find oddity If, this is the problem!

  7. Doing something until getting to a wanted statement! That is “iteration”! Another core of programming. Syntax? While

  8. Let’s do examples! Practice is all that matter…

  9. Find number of bits a number needs • Number of digits • Sum of digits • Reverse number (1435 => 5341) • Prime Number • optimizations Practice

  10. Thank you! Let’s go for some sleep :D Any question?

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