Software and hardware presentation
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The document summarizes key aspects of computer hardware, software, and programming. It describes the main hardware components of a computer system including the CPU, memory, input devices, and output devices. It then explains the different types of software, including application software, system software, operating systems, and translation systems. Finally, it provides an overview of the software development process, including editing, compiling, linking, and executing code, and gives a simple example "Hello World" program.
Software and hardware presentation
- 2. Hardware Four components of a computer system: CPU - central processing unit Makes decisions, performs computations, and delegates input/output requests Memory: Disk Drives, CD drives, Tape drives, USB flash drives. Stores information Input devices: Keyboard, Mouse, Gets information from the user to the computer Output devices: monitor Sends information from computer to the user
- 3. Hardware M e m o r y C P U I n p u t D e v ic e s O u t p u t D e v ic e s
- 4. S y s t e m S o f t w a r e A p p lic a t io n S o f t w a r e S o f t w a r e
- 5. Software Application software Easy-to-use programs designed to perform specific tasks System software Programs that support the execution and development of other programs Two major types Operating systems Translation systems (compilers & linkers)
- 6. Application Software Application software makes computer popular and easy to use Common application software: Microsoft Word, WordPerfect PowerPoint Netscape, Internet Explorer PhotoShop, Photo-Paint Quick Time Dreamweaver
- 7. Operating System Controls and manages the computing resources Examples Windows, Unix, MSDOS, Important services that an operating system provides: Security: prevent unauthorized users from accessing the system Commands to manipulate the file system Input and output on a variety of devices Window management
- 8. Levels of programming language Machine binary language: unintelligible Low-level assembly language Mnemonic names for machine operations Explicit manipulation of memory addresses Machine-dependent High-level language Readable Machine-independent
- 9. How to translate? Examples of compilers: Microsoft Visual C++, Eclipse, g++ A program written in high-level programming language (for example, C++ program) A low-level (machine language) program that is understandable by a computer (for example, a PC) COMPILER (for example, Visual C++)
- 10. Translation System Set of programs used to develop software Types of translators: Compiler Linker Examples Microsoft Visual C++, Eclipse, g++
- 11. Software Development Major activities Editing (writing the program) Compiling (creates .obj file) Linking with compiled files (creates .exe file) Object files Library modules Loading and executing Testing the program C o m p ile L in k L ib r a r y r o u t in e s O t h e r o b je c t file s T h in k E d it L o a d E x e c u t e S o u r c e P r o g r a m
- 12. Integrated Development Environments Combine all of the capabilities that a programmer would want while developing software (VC++ 2008, Eclipse) Editor Compiler Linker Loader Debugger Viewer
- 13. Our First Program // a simple program #include <iostream> using namespace std; int main() { cout << "Hello world!" << endl; return 0; } Print statement Ends execution of main() which ends program Comments Function named main() indicates start of program
- 14. Summary