Schaum’s Outline Series OF Principles of Computer Science phần 5 ppt

... great deal of computer science research during the 1960s, 1970s, and 1980s. Several solutions have been developed. Dekker offered the first software solution to the problem in 19 65, and a simplification ... operating systems (1 955 –19 65) . A “resident monitor” (the operating system) provided the commonly needed routines to perform I/O to the devices of the day (most of the OS co...

Ngày tải lên: 12/08/2014, 21:22

... most modern computers. 4 INTRODUCTION TO COMPUTER SCIENCE [CHAP. 1 SCHAUM’S OUTLINE OF Principles of COMPUTER SCIENCE CARL REYNOLDS Department of Computer Science Rochester Institute of Technology PAUL ... Jones (http://www.cs.uiowa.edu/~jones/cards/history.html). SCHAUM’S OUTLINE OF Principles of COMPUTER SCIENCE CHAPTER 1 Introduction to Computer S...

Ngày tải lên: 12/08/2014, 21:22

... but in computer science, because of the ubiquity of binary math, this is usually written as lg n, meaning logarithm to the base 2 of n. The total running time T of the merge sort consists of the ... million units of time, but solving the problem for a matrix of 50 entries will require about a million billion units of time. If a unit of time is a millionth of a second,...

Ngày tải lên: 12/08/2014, 21:22

... return all but the first element of the list: ( cdr (list 1 5 6) ) ( 5 6 ) 56 SOFTWARE [CHAP. 4 DO 5 J=1, N READ( *, 3 ) ID, ( X(K), K=1, M ) 3 FORMAT( I5, 25F3.0/ (5X, 25F3.0) ) SUM = 0.0 DO 4 K=1, ... the file > That’s only seven lines of code, and the job is done. CHAP. 4] SOFTWARE 55 The IBM 360 family of computers was the first example of a set of computers which di...

Ngày tải lên: 12/08/2014, 21:22

... as part of the state of each individual car (part of the state of each instance). On the other hand, we would maintain a count of the total number of Automobiles as part of the state of the class ... day of Christmas: Three French hens Two turtle doves And a partridge in a pear tree CHAP. 5] PROGRAMMING IN JAVA 75 66 CHAPTER 5 Programming in Java INTRODUCTION Java is one...

Ngày tải lên: 12/08/2014, 21:22

... number. Since the number of frames of physical memory is likely to be much smaller than the number of pages of logical memory in a 64-bit computer (with 4K pages, 2 52 = way too many logical ... index, and on average the system must read half of them). So, indexing reduces the number of reads from 50 0,000 to 1000—improvement by a factor of 50 0. Files may contain informat...

Ngày tải lên: 12/08/2014, 21:22

... relation consists of rows, each of which represents an instance of the entity type, and of columns, each of which represents one of the attributes of the entity type. Each row of a relation is ... row more often than tuple, but a tuple is a row of a table, an instance of a relation, an instance of an entity type. Each tuple consists of the values of the attributes fo...

Ngày tải lên: 12/08/2014, 21:22

... industries accounted for over $53 5 billion, or 5. 24 percent of the total GDP of the United States. If one also includes the dependent industries, the total jumps to $791 billion and 7. 75 percent of GDP. The copyright ... subquery returns any rows ALL True if all of a set of comparisons are true ANY True if any one of a set of comparisons is true SOME True if some of a set...

Ngày tải lên: 12/08/2014, 21:22

... the guess: 51 . 15 Find average of guess and quotient: (51 . 15 + 40) / 2 = 45. 5 75 Repeat with the new guess ( 45. 5 75 after the first round). Second round result: 45. 23 Third round result: 45. 232 (from: ... 5. 8968 253 968 253 97 5. 2 Write a Java program to compute the area of a circle whose radius is 5. For the value of PI, use 3.14. Now rewrite your program so that it...

Ngày tải lên: 12/08/2014, 21:22

... (American Standard Code for Information Interchange), 35, 95 assembler, 45 assembly language, 36, 45 Atanasoff, John, 8, 11–12 Atanasoff-Berry Computer (ABC), 8–9 Babbage, Charles, 6–7 Backus-Naur ... development of timesharing computers, and has remained an important part of scheduling for interactive computer systems? The round robin scheduler was the basis of the first timesha...

Ngày tải lên: 12/08/2014, 21:22