how to write a pgm in c swapping 3 variable,plz giv logic only?

Answer 1

only 2 variable can be swapped
temp = x
x=y
y=temp

Answer 2

i hope your ques shud be a bit clear. If you want to swap three variable you have to mention the places of the three variables. Or else there will totally 6 possibilities with three variables.

Answer 3

It's impossible to swap 3 variables!
x, y and z
"x" takes the value "y" and "y" takes the value of "x"; which value should "z" take then?!
Swapping means a bi-directional exchange of values between two variables.
if x takes the value of y and y takes the value of x, z takes the value of nothing
if x takes the value of z and z takes the value of x, y takes the value of nothing
if y takes the value of z and z takes the value of y, x takes the value of nothing
You see ... There will always be one variable that takes nothing!
It's impossible

Answer 4

#include
using namespace std;
main()
{
int x,y ;

system("cls");
cout <<"\n\tInterchange x and y using only two variables";
cout << "\n\tand using three mathematical statements.\n";
cout << "\n\tEnter the value of x and y :";
cin >> x >> y;
x=x+y;
y=x-y;
x=x-y ;
cout << "\n\tx= " << x << "\t\ty= " << y << "\n\n";
system("pause");

}