assignment c++ [najmi].docx

7/17/2019 assignment C++ [Najmi].docx

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Assignment C++

Programminga) Go tob) Whilec) Break and Continued) While Truee) Do / Whilef) Jump / Loopg) If / Ele

a. /* C++ program to demonstrate the working of goto statement. */

/* This program calculates the average of numbers entered by user. */

/* f user enters negative number! it ignores that number and

calculates the average of number entered before it.*/

" include #iostream$

using namespace std%

int main&' (

)oat num! average! sum .%



int i! n%

cout##,-aimum number of inputs ,%

cin$$n%

for&i0% i # n% ++i' (

cout##,1nter n,##i##, ,%

cin$$num%

if&num # .' (

goto 2ump% /* Control of the program moves to 2ump% */

3

sum + num%

3

2ump

averagesum/&i40'%

cout##,5nAverage ,##average%

return %

-aimum number of inputs 0

1nter n0 6.7

1nter n6 8.9

1nter n7 48.9

Average 7.:8

b. // while_statement.cpp

#include <string.h>#include <stdio.h>



char *trim( char *szSource )

{

char *psz!S " $

// Set pointer to character be%ore terminating &'

psz!S " szSource strlen( szSource ) +$

// iterate bac,wards until non -_- is %ound

while( (psz!S >" szSource) (*psz!S "" -_-) )

*psz!S " --$

return szSource$

0

int main()

{

char szbu%12 " 3+4567_____3$

print%_s(3n8e%ore trim9 :s3; szbu%)$

print%_s(3n%ter trim9 :sn3; trim(szbu%))$

0

The test of expression takes place before each eecution of the loop% therefore!

a while loop eecutes ;ero or more times. expression must be of an integral type! a

pointer type! or a class type with an unambiguous conversion to an integral or pointer

type.

A while loop can also terminate when a break !goto or return within the statement

body is eecuted. <se continue to terminate the current iteration without eiting

the while loop.continue passes control to the net iteration of the while loop.

c. // C++ Program to demonstrate working of break statement

"include #iostream$using namespace std%int main&' ( )oat number! sum .%

while &true' ( // test epression is always true cout##,1nter a number ,% cin$$number%

if &number = .' ( sum + number% 3 else ( break% // terminating the loop if number e>uals to .

https://msdn.microsoft.com/en-us/library/6e3dc2z3.aspx

https://msdn.microsoft.com/en-us/library/6e3dc2z3.aspx



3

3 cout##,?um ,##sum% return %3

1nter a number @

1nter a number 7.@

1nter a number 9.

1nter a number [email protected]

1nter a number

?um :.9

d. while&true'

( //Bo -y oop ?tuD 3

I think that this may be easier to read and is definitely the standard for use in C#:

e."include #iostream$


int main&' ( int number! i 0! factorial 0% cout## ,1nter a positive integer ,% cin $$ number%

while & i # number' ( factorial * i% //factorial factorial * i% ++i% 3

cout##,Eactorial of ,##number##, ,##factorial% return %3

1nter a positive integer @Eactorial of @ 6@

In this program, user is asked to enter a positive integer which is stored in variable

number (supposed user entered 4). Here is the working of while loop in this program:



0. nitially! i = 1! test epression i # number is true! factorial becomes 0.

6. Fariable i is updated to 6! test epression is true! factorial becomes 6.

7. Fariable i is updated to 7! test epression is true! factorial becomes 9.

@. Fariable i is updated to @! test epression is true! factorial becomes 6@.

8. Fariable i is updated to 8! test epression is false and while loop is

terminated.

f. The following eample shows how to write a simple for loop in C++/C. This

eample has eactly the same eDect as the while loop.

%or (int count " +$ count <" 7$ count)

{

=onsole99riteine(count * count)$

0

=onsole99riteine(3?he end3)$

The parentheses after the for keyword contain three epressions separated by

semicolons. The Grst epression performs loop initiali;ation! such as initiali;ing the loop

counter. This initiali;ation epression is eecuted once only! at the start of the loop.

0. Continue working with the pro2ect from the previous eercise.

6. -odify the code in the main function to use a for loop rather than a while loop! as

shown here

5. =onsole99riteine(3elcome to @our calendar assistant3)$

6.

7. %or (int count " +$ count <" 7$ count)

A. {

B. =onsole99rite(3nClease enter date 3)$

D. =onsole99riteine(count)$

E.

+. int @ear " FetGear()$

++. int month " FetHonth()$+4. int da@ " FetIa@(@ear; month)$

+5. Iispla@Iate(@ear; month; da@)$

0

Hotice that there is no count++ statement after displaying the date. This is because

the for statement takes care of incrementing the loop counter.

0@. Iuild and run the application. The application asks you to enter Gve dates! as

before.



g. "include #iostream$


int main&' ( int number% cout## ,1nter an integer ,% cin$$ number%

if & number $ ' ( cout ## ,Jou entered a positive integer ,##number##endl% 3

else ( cout##,Jou entered a negative integer ,##number##endl% 3

cout##,This statement is always eecuted because itKs outside if...elsestatement.,% return %

3

1nter an integer 4@

Jou entered a negative integer 4@ This statement is always eecuted because itKs outside if...else statement.

The end

assignment c++ [najmi].docx

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