A Concise And Practical Introduction To Programming by Frank Nielsen

By Frank Nielsen

This light advent to programming and algorithms has been designed as a primary direction for undergraduates, and calls for no earlier wisdom.

Divided into elements the 1st covers programming easy initiatives utilizing Java. the elemental notions of variables, expressions, assignments with variety checking are checked out sooner than relocating directly to conceal the conditional and loop statements that let programmers to manage the guideline workflows. capabilities with pass-by-value/pass-by-reference arguments and recursion are defined, via a dialogue of arrays and knowledge encapsulation utilizing objects.

The moment a part of the publication specializes in information constructions and algorithms, describing sequential and bisection seek concepts and analysing their potency through the use of complexity research. Iterative and recursive sorting algorithms are mentioned through associated lists and customary insertion/deletion/merge operations that may be performed on those. summary info buildings are brought besides how one can application those in Java utilizing object-orientation. The ebook closes with an creation to extra developed algorithmic projects that take on combinatorial optimisation problems.

Exercises are incorporated on the finish of every bankruptcy to ensure that scholars to perform the ideas discovered, and a last part comprises an total examination which permits them to guage how good they've got assimilated the cloth coated within the book.

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6 Variables, assignments and type checking 13 c r e d i t =100+150; System . out . p r i n t ( " Total credit ( in US dollars ) :\ t" ) ; System . out . p r i n t l n ( c r e d i t ) ; d e b i t =50+25+100; System . out . p r i n t ( " Total debit ( in US dollars ) :\ t" ) ; System . out . p r i n t l n ( d e b i t ) ; System . out . p r i n t ( " Balance :" ) ; System . out . p r i n t l n ( c r e d i t −d e b i t ) ; } } Running the above program, we get the console output: Total credit (in US dollars): Total debit (in US dollars): Balance:75 250 175 In Java, we can choose to declare variables using one of the following primitive types7 : int (integer simple precision stored onto a machine word of 32 bits), long (integer double precision stored onto two machine words, 64 bits), float (simple precision real stored onto a machine word), double (double precision real ), char (character encoding worldwide language characters using 16 bits8 ) and boolean (two states: true or false).

2 (Time conversion with user keyboard input) Modify the previous program to read the number of seconds from the console. java. For example, the program execution will yield the following session: How many seconds? txt ... 3 (Time comparison) Design a program that compares two time durations (in hour/min/sec format) by first converting them into their respective total number of seconds, and then comparing the two delays using the if (booleanPredicate ) {} else {} conditional. This voluntarily anticipates the next chapter.

Expressions, Variables and Assignments { System . out . p r i n t ( " Total credit ( in US dollars ) :\ t" ) ; System . out . p r i n t l n (100+150) ; System . out . p r i n t ( " Total debit ( in US dollars ) :\ t" ) ; System . out . p r i n t l n (50+25+100) ; System . out . p r i n t ( " Balance :" ) ; } } Running this program, we get: Total credit (in US dollars): Total debit (in US dollars): 250 175 Note that the \t inside the string "Total credit (in US dollars):\t" denotes the tabulation character that allows one to nicely align the latter numbers.

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