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CS101 Fall 2004 Course Introduction• Professor Douglas Moody

– Monday – 12:00-1:40– Email – dmoody@citytech.cuny.edu– Web Site: websupport1.citytech.cuny.edu

Click on Technology and Design

• Select My page

– Office Hours Monday: 6-7 pm

Friday: 5-6 pm and by appointment

• Prerequisite: Enthusiasm about computers

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CS101 Fall 2004

• Text Book– Programming Right from the Start with Visual

Basic.Net Updated, Edition by Crews-MurphyMillspaugh, Prentice-Hall Publishers

• Attendance : Mandatory , maximum of 10% absence

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CS101 Fall 2004• Grading

– Tests (19%)– Midterm (19%)– Final (31%)– Programs (31%) (Homework Assignments)

• Programs / Homeworks must done in order to succeed in the course

• Plan on 1 and ½ hours of non class time for the course

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CS101 Fall 2004 Objectives

• Learn how computer solve problems and perform tasks

• Understand the concepts behind computer programs

• Develop some basic programming skills

• Have fun making the computer work for you

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1-1 Logic and Syntax

• A computer program is a solution to a problem.

• An algorithm is the logical design used to accomplish a specific objective.

• The Visual Logic Development System combines the utility of flowcharts and pseudocode with computer simulation.

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1-1 Logic and Syntax (cont.)

• Syntax refers to the specific rules of a programming language.

• An information system is a combination of people and technology that collect, organize, and process data to produce information.

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1-1 Logic and Syntax (cont.)

• An information system must do at least three things:– input data into the system– process data within the system– output resulting information from the system

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1-2 “Hello World”

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1-2 “Hello World” (cont.)

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1-2 “Hello World” (cont.)

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1-3 Input Statements

• An input statement accepts data from the user and stores that data into a variable.

• A variable is a storage location that can be accessed and changed by developer code.

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1-3 Input Statements (cont.)

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1-3 Input Statements (cont.)

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Simple Programming Formats

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1-4 Weekly Paycheck Program

The weekly paycheck program has two input variables:

Hours and Rate

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1-5 Assignment Statements

• The assignment statement can be used to perform a calculation and store the result.

• An expression is a value-returning code element, such as a variable or mathematical formula.

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How to WriteArithmetic Expressions

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How to WriteArithmetic Expressions (cont.)

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1-6 Output Statements

• Types of output include– Screen output– Printed output– Sound output– Saving to storage devices

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1-6 Output Statements (cont.)

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1-6 Output Statements (cont.)

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Intrinsic Functions

• Intrinsic functions are predefined commands that provide developers with common, helpful functionality.

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Intrinsic Functions (cont.)

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1-7 Debugging withVisual Logic

• A programming mistake is often called a bug.

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Chapter Summary

• Variables are storage locations used for holding input and processing information.

• Each variable has two components: its name and its value.

• Input statements are used to get data into variables.

• Expressions are value-returning code elements.

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Chapter Summary (cont.)

• Assignment statements are used to perform calculations and store the result.

• Output statements are used to display information.

• Input, assignment, and output statements are sufficient to write small programs.