Answer / shobha

my answer is very correct compared to the others.(1 to 3)

in answer 1 pinky declared a variable(ia) that is never
used in the program and used a variable(a) that is not
declared.finally pinky did not close main function i.e }

in answer 2 Banti Sharma has written the logic of the
program like a program, but he did not wrote the actual
program,if it is a program then the output is nothing,
because there is no statement present for displaying the
values of a and b


in answer 3 Mona also written the logic of the program like
Banti Sharma but Mona wrote it in a method.and mona never
called that method and from where mona is passing values to
var1 and var2.and mona did not displayed the result.

but in answer 4, that means in my answer,

i did not write the entire program,i just explained the
logic how u can swap without the third variable.

i have taken two variables and assigned sample values
(x=10,y=20) to them and explained each and every line with
that sample values, such that the person who asked this
question can write a program of his own.

Banti Sharma, i think u are not trying to answer the
questions but u are trying to point out the silly mistakes
in answers posted by others.

Answer / sushma rani

Here we have two variable A=4, B=3

we need to swap values without taking any third variable
result should be A=3, B=4

for that we can do ,
A=A+B-A (e.g. A=4+3-4 => 3)
and
B=B+A-B (e.g. B=3+4-3 => 4)

That's it....

Thanks & Regards
Sushma Rani
Bangalore
===========

Answer / banti sharma

Miss Sobha upto My Knowlegde the answer of "Shiv" was most
appropriate and if you have Any knowledge of Programming I
repeat again "Any knowledge of programming" then you may
find it out yourself that Bitwise Shift Operation is much
more time Efficient then that of "+","-","*","/.And if I say
about my answer then it is also correct having No mistakes
as the Question is "How to swap values between two variables
without using a third variable?" so if you read it carefully
then it does not say anywhere to print the Swaped values.I
think you have got Y i wrote like that,IF I say about
another logic then one more logic may be used like:

a=a*b;
b=a/b;
a=a/b;

though I m using Multiply and Devision still its better then
my past logic(so better then urs aytomatically) now if You
may find y? multiplication/Devision is more efficient then
Plus/minus then Do Googling.
have a good day

Answer / kiran

int a=10,b=20;
a=b;
b=a/2;

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