杭州电子科技大学：《计算机、互联网和万维网简介》教学资源（PPT课件）Chapter 01 C++ Programming Basics

Introduction to Computers the Internet and World Wide Web Chapter 01 C++ Programming basics rang 徐岗gxu(@hdu.edu.cn http://xugang.hdu.edu.cn

Chapter 01 C++ Programming Basics Gang Xu 徐 岗 gxu@hdu.edu.cn http://xugang.hdu.edu.cn Introduction to Computers, the Internet and World Wide Web

Working experience Research Interests ·01/01/2016-01/03/2016 Isogeometric Analysis and Modeling Visiting Scholar(with Prof. Kin-Chuen Hui CAD Lab, The Chinese University of Hong Kong Computer Aided Geometric Design; 02/07/2014-02/09/2014 Visiting Scholar(with Prof. Stephane Bordas) Computer Graphics and Image processing Cardiff University 09/01/2014-08/03/2014 Visiting Scholar (with Prof. Weiyin Ma) Department of Mechanical and Biomedical Engineering, City University of Hong Kong 02/07/201302/09/2013 Visiting Scholar(with Prof. Kin-Chuen Hui and Charlie CI CAD Lab, The Chinese University of Hong Kong ·01/11/2008-31/10/2010 Postdoctoral Researcher (with Prof. Bernard Mourrain) GALAAD project, INRIA Sophia-antipol ·01/09/2008-25/10/2008 Visiting Scholar(with Prof. Kin-Chuen Hui CAD Lab, The Chinese University of Hong Kong ·03/07/2008-30/07/2008 Visiting Scholar(with Prof Wenping Wang) CG Lab, The University of Hong Kong 01/02/2008-30/04/2008 Visiting Student(with Prof Helmut Pottmann) Geometric Modeling and Industrial Geometry, vienna University of Technology

What is a computer? A computer is a device capable of performing computations and making logical decisions at speeds millions (even billions)of times faster than human beings can Computers process data under the control of sets of instructions called computer programs. These programs guide the computer through orderly sets of actions specified by people called computer programmers A computer consists of various devices referred to as hardware(e.g, the keyboard, screen, mouse, hard disk, memory, DVDs and processing units). The programs that run on a computer are referred to as software

What is a Computer? ◼ A computer is a device capable of performing computations and making logical decisions at speeds millions (even billions) of times faster than human beings can. ◼ Computers process data under the control of sets of instructions called computer programs. These programs guide the computer through orderly sets of actions specified by people called computer programmers. ◼ A computer consists of various devices referred to as hardware (e.g., the keyboard, screen, mouse, hard disk, memory, DVDs and processing units). The programs that run on a computer are referred to as software

History of computer development 1981 the first Il In 1946 Pennsylvania University in the uSa developed the first computer in the world Notebook Computer

History of computer development In 1946 Pennsylvania University in the USA developed the first computer in the world In 1981 the first IBM PC Notebook Computer

Computer Organization Input unit. This is the receiving section of the computer. It obtains information (data and computer programs) from input devices and places this information at the disposal of the other units for processing Output unit. This is the shipping" section of the computer. It takes information that the computer has processed and places it on various output devices to make the information available for use outside the computer Memory unit. This is the rapid-access, relatively low-capacity warehouse" section of the computer. It stores computer programs while they are being executed

Computer Organization ◼ Input unit. This is the "receiving" section of the computer. It obtains information (data and computer programs) from input devices and places this information at the disposal of the other units for processing. ◼ Output unit. This is the "shipping" section of the computer. It takes information that the computer has processed and places it on various output devices to make the information available for use outside the computer ◼ Memory unit. This is the rapid-access, relatively low-capacity "warehouse" section of the computer. It stores computer programs while they are being executed

Computer Organization Arithmetic and logic unit (ALU). This is the manufacturing" section of the computer. It is responsible for performing calculations. It contains the decision mechanisms that allow the computer output unit Central processing unit (CPU). This is the administrative section of the computer Secondary storage unit. This is the long-term, high-capacity warehousing" section of the computer

Computer Organization ◼ Arithmetic and logic unit (ALU). This is the "manufacturing" section of the computer. It is responsible for performing calculations. It contains the decision mechanisms that allow the computer Output unit. ◼ Central processing unit (CPU). This is the "administrative" section of the computer. ◼ Secondary storage unit. This is the long-term, high-capacity "warehousing" section of the computer

Early Operating Systems Early computers could perform only one job or task at a time. This is often called single-user batch processing. The computer runs a single program at a time while processing data in gr。 ups or batches. Early operating systems smoothed and speeded up the transition between jobs, and hence increased the amount of work, or throughput, computers could process

Early Operating Systems ◼ Early computers could perform only one job or task at a time. This is often called single-user batch processing. The computer runs a single program at a time while processing data in groups or batches. ◼ Early operating systems smoothed and speeded up the transition between jobs, and hence increased the amount of work, or throughput, computers could process

Personal, Distributed and Client/Server Computing The most powerful desktop machine scalled workstations provide individual users with enormous capabilities Information is shared easily across computer networks, where computers called file servers offer a common data store that may be used by client computers distributed throughout the network, hence the term client/server computing C+t has become widely used for writing software for operating systems, for computer networking and for distributed client/server applications

Personal, Distributed and Client/Server Computing ◼ The most powerful desktop machine scalled workstations provide individual users with enormous capabilities. ◼ Information is shared easily across computer networks, where computers called file servers offer a common data store that may be used by client computers distributed throughout the network, hence the term client/server computing. ◼ C++ has become widely used for writing software for operating systems, for computer networking and for distributed client/server applications

The Internet and the World Wide web 无线用尸; Seago g 已海歌 查询用户 无线通讯网 港区无线局域网

The Internet and the World Wide Web

The Internet and the World Wide Web The Internet and the world wide web are surel among humankind 's most important and profound creations In the past, most computer applications ran on computers that were not connected to one another. Today s applications can be written to communicate among the world's computers The Internet mixes computing and communications technologies. It makes our work easier. It makes information instantly and conveniently accessible worldwide. It enables individuals and local small businesses to get worldwide exposure

The Internet and the World Wide Web ◼ The Internet and the World Wide Web are surely among humankind's most important and profound creations. ◼ In the past, most computer applications ran on computers that were not connected to one another. Today's applications can be written to communicate among the world's computers. ◼ The Internet mixes computing and communications technologies. It makes our work easier. It makes information instantly and conveniently accessible worldwide. It enables individuals and local small businesses to get worldwide exposure