Answer / thiyagu.p

Simply saying, IF-ELSE can have values based on constraints
where SWITCH can have values based on user choice.

Answer / fazlur rahaman naik

The main difference between switch - case and if - else is
we can't compare variables.

in the if - else, first the condition is verified,then it
comes to else whereas in the switch - case first it checks
the cases and then it switches to that particular case.

Answer / kuldeep sadhu

actually if else is a cndition checking system but the
switch is a selection of user typed type......
& secondly switch does not check all cases but jump directly
on the user interested case but if checkes all.............

Answer / sujith

I would like to answer this question from a compiler
perspective. When we have if else or if else tree, we have
many compare instructions ( assembly generated by compiler)
where as switch has only one compare and jump instruction.
If the idea is to does something after comparing the values,
it is always better to go with the switch case than if else
tree.

I would appreciate analyzing the assembly code, with the
same source, with if else tree and switch case statements.

Answer / ananth kumar

switch has its own pros and cons,

Favours coding style.
From performance point, switch case creates table. It
directly jumps to the required location based on table
contents.

If-else is hard for code-walk
Optimised (please check).

Answer / vikky

expressions cannot be used as arguments in switsh, but in
if else any kind of exp can be used...
in the case of checkin a single variable for several values
SWITCH is the BEST.
in all other cases if else holds gud.

Answer / sanjay parmar sirsa

If-else
we depand the condition
if condition true then true block will be excuted
else
false block will be excuted
switch have number of choice we can excute any choice

Answer / mikew

The switch branches on one value only, whereas the if-else
tests multiple logical expressions.

So you could say that the switch is a subset of if-else.

The potential difference if that switch is conceptually an
N-way branch point, whereas the if-else is always a
(repeated) binary branch.

However, if you are checking, say, a return code, against a
varied list of possibilities, then the switch can give
greater clarity to source code - and allow simpler addition
of new cases, making it easier for maintenance, as well as
allowing the compiler to generate simpler code.

Simpler code is possible because it can generate a jump
table to perform the multiple comparisons, i.e. in pseudo-code:

_jump_table:
DEFW case1_address
DEFW case1_value
...
DEFW caseN_address
DEFW caseN_value
DEFW NULL /* terminator */

- search _jump_table for case_value
- branch to corresponding case_address, or take default
action if NULL terminator found instead.

In the special case that case1 ... caseN values are
sequential numbers (maybe with a few gaps) then the table
and code can be further simplified as a simple indexed branch:

_jump_table:
DEFW case1_address
...
DEFW default_address /* fill in any holes !*/
...
DEFW caseN_address

- check value is between case1_value and caseN_value
- subtract case1_value
- load branch address word from _jump_table word-indexed on
previous result

Answer / sherin

There are some things that you simply cannot do with a
switch. These are:
A float expression cannot be tested using a switch
Cases can never have variable expressions (for example it is
wrong to say case a +3 : )
Multiple cases cannot use same expressions.

Answer / sujoy dutta

we can use all varriables within if else.but we can't use
all verriables within switch case.example :-float and
String we can't use within switch case.

What are Storage Classes in C ?

32 Answers   CTS, HP, IBM, Maharaja Whiteline, Tamil Nadu Open University TNOU, TATA, TCS, Wipro,

Agonistic behavior, or aggression, is exhibited by most of the more than three million species of animals on this planet. Animal behaviorists still disagree on a comprehensive definition of the term, hut aggressive behavior can be loosely described as any action that harms an adversary or compels it to retreat. Aggression may serve many purposes, such as Food gathering, establishing territory, and enforcing social hierarchy. In a general Darwinian sense, however, the purpose of aggressive behavior is to increase the individual animal’s—and thus, the species’—chance of survival. Aggressive behavior may he directed at animals of other species, or it may be conspecific—that is, directed at members of an animal’s own species. One of the most common examples of conspecific aggression occurs in the establishment and maintenance of social hierarchies. In a hierarchy, social dominance is usually established according to physical superiority; the classic example is that of a pecking order among domestic fowl. The dominance hierarchy may be viewed as a means of social control that reduces the incidence of attack within a group. Once established, the hierarchy is rarely threatened by disputes because the inferior animal immediately submits when confronted by a superior. Two basic types of aggressive behavior are common to most species: attack and defensive threat. Each type involves a particular pattern of physiological and behavioral responses, which tends not to vary regardless of the stimulus that provokes it. For example, the pattern of attack behavior in cats involves a series of movements, such as stalking, biting, seizing with the forepaws and scratching with tile hind legs, that changes very little regardless of the stimulus—that is, regardless of who or what the cat is attacking. The cat’s defensive threat response offers another set of closely linked physiological and behavioral patterns. The cardiovascular system begins to pump blood at a faster rate, in preparation for sudden physical activity. The eves narrow and the ears flatten against the side of the cat’s head for protection, and other vulnerable areas of the body such as the stomach and throat are similarly contracted. Growling or hissing noises and erect fur also signal defensive threat. As with the attack response, this pattern of responses is generated with little variation regardless of the nature of the stimulus. Are these aggressive patterns of attack and defensive threat innate, genetically programmed, or are they learned? The answer seems to be a combination of both. A mouse is helpless at birth, but by its l2th day of life can assume a defensive threat position by backing up on its hind legs. By the time it is one month old, the mouse begins to exhibit the attack response. Nonetheless, copious evidence suggests that animals learn and practice aggressive behavior; one need look no further than the sight of a kitten playing with a ball of string. All the elements of attack—stalking, pouncing, biting, and shaking—are part of the game that prepares the kitten for more serious situations later in life. 7) The passage asserts that animal social hierarchies are generally stable because: a) the behavior responses of the group are known by all its members. b) the defensive threat posture quickly stops most conflicts. c) inferior animals usually defer to their physical superior. d) the need for mutual protection from other species inhibits conspecific aggression. 8) According to the author, what is the most significant physiological change undergone by a cat assuming the defensive threat position? a) An increase in cardiovascular activity b) A sudden narrowing of the eyes c) A contraction of the abdominal muscles d) The author does not say which change is most significant 9) Based on the information in the passage about agonistic behavior, it is reasonable to conclude that: I. the purpose of agonistic behavior is to help ensure the survival of the species. II. agonistic behavior is both innate and learned. III. conspecific aggression is more frequent than i aggression. a) I only b) II only c) I and II only d) I,II and III only 10) Which of the following would be most in accord with the information presented in the passage? a) The aggressive behavior of sharks is closely inked to their need to remain in constant motion. b) fine inability of newborn mice to exhibit the attack response proves that aggressive behavior must be learned. c) Most animal species that do riot exhibit aggressive behavior are prevented from doing so by environmental factors. d) Members of a certain species of hawk use the same method to prey on both squirrels and gophers. 11) The author suggests that the question of whether agonistic behavior is genetically programmed or learned: a) still generates considerable controversy among animal behaviorists. b) was first investigated through experiments on mice. c) is outdated since most scientists now believe the genetic element to be most important. d) has been the subject of extensive clinical study. 12) Which of the following topics related to agonistic behavior is NOT explicitly addressed in the passage? a) The physiological changes that accompany attack behavior in cats b) The evolutionary purpose of aggression c) Conspecific aggression that occurs in dominance hierarchies d) The relationship between play and aggression 13) The author of this passage is primarily concerned with: a) analyzing the differences between attack behavior and defensive threat behavior. b) introducing a subject currently debated among animal behaviorists. c) providing a general overview of aggressive behavior in animals. d) illustrating various manifestations of agonistic behavior among mammals.

0 Answers   Accenture,

What is volatile variable in c with example?

0 Answers  

CAN ANYONE PLEASE HELP ON THIS PROGRAM FOR MY EXAM..TQ Write a C program to help a H’s Restaurant automate its breakfast billing system. Your assignment should implement the following items: a. Show the customer the different breakfast items offered by the H’s Restaurant. b. Allow the customer to select more than one item from the menu. c. Calculate and print the bill to the customer. d. Produce a report to present your complete program and show more sample output. Assume that the H’s Restaurant offers the following breakfast menu: Plain Egg $2.50 Bacon and Egg $3.45 Muffin $2.20 French Toast $2.95 Fruit Basket $3.45 Cereal $0.70 Coffee $1.50 Tea $1.80 Your program must do the following task below: a. Define the data structs, menu item types with two components: menu item of type string and menu price of type double. Use an array to declare the data structs. b. Function get data to loads the data into the array menu list. c. Function show menu to show the different breakfast items offered by the restaurant and tell the user how to select the items. d. Function print receipt to calculates and prints the customer receipt. The billing amount should include a 5% tax. e. Format your output with two decimal places. The name of each item in the output must be left-justify. You may assume that the user selects only one item of a particular type. f. The two sample output as shown: Welcome to HiFi’s Restaurant 1 Bacon and Egg $3.45 1 Muffin $2.20 1 Coffee $1.50 Tax 5% $0.35 Amount Due $7.50

1 Answers  

What happens if header file is included twice?

0 Answers  

Explain how can I right-justify a string?

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How can type-insensitive macros be created?

0 Answers  

In CMM or CMMI certified organizations,we assess only the standard software processes of the organization. We do not assess the organizations other functional departments like HR or Admin. Then how can we certify the entire organization as CMM level company?? We have assessed only software related activities. Right. There is no relation with other departments like Accounts, HR or Admin. Then how can we claim that the whole company is a CMM certified company?

1 Answers   Melstar,

what are the difference between ANSI C and Let Us c and Turbo C

4 Answers   LG Soft,

what is c programing

11 Answers   Wipro,

If errno contains a nonzero number, is there an error?

0 Answers  

a number whose only prime factors are 2,3,5, and 7 is call humble number,,write a program to find and display the nth element in this sequence.. sample input : 2,3,4,11,12,13, and 100.. sample output : the 2nd humble number is 2,the 3rd humble number is 3,the 4th humble number is ,the 11th humble number is 12, the 12th humble number is 14, the 13th humble number is 15, the 100th humble number is 450.

0 Answers