funny challange

[achalprogrammer]

my school teacher asked me to write a program to enter two number swap their values and display on the screen. Can someone help me in the program but the condition is that i have to make it only with two variables and using void satement

[vlad from moscow]

What is the "void statement"?

[achalprogrammer]

main void ()
she said that some mathematical will be used.

[vlad from moscow]

What is "main void () "?

[Dy7SLyTq]

i could do it with one. (i think he means void main (which should be int main()) although you could use std::swap and not right your own function

[achalprogrammer]

When we write a programe after including header file we write this statement like:
#include <iostream.h>
#include <conio.h>

void main ()
{
cout << " understood @vlad from moscow " ;
}

[Dy7SLyTq]

god your compiler must be old

[Dy7SLyTq]

you could go a and b the c of d and write a whole container

[achalprogrammer]

/**********************************
With three variable this is the programe
**********************************/

# include <iostream.h>
# include <conio.h>

void main ()
    { 
       float a , b , c ;
       clrscr () ;
       cout << " Enter the value of a = " ;
       cin << a ;
       c = a ;
       a = b ;
       b = c :
       cout << " Swapped results is " << a << " and " << b ;
      getch () ;
    } 

/*************************************
And this is working correctly
************************************/

[Dy7SLyTq]

yeah but that uses three

[achalprogrammer]

i want a programe code which uses two variables only.

[Chriscpp]

The code you posted will never work too many errors :(

[achalprogrammer]

THERE IS ERROR IN 12TH LINE ONLY

[JLBorges]

> i want a programe code which uses two variables only.

See: http://en.wikipedia.org/wiki/XOR_swap_algorithm

And pay attention to: http://en.wikipedia.org/wiki/XOR_swap_algorithm#Reasons_for_avoidance_in_practice

[Dy7SLyTq]

line 11, 12, and 9

[Chriscpp]

and line 9

[vlad from moscow]

This program can not work correctly. First of all this statement does not do what you think it should do

cin << a ;

and you did not enter values for a and b.:)

[Chriscpp]

and btw how do you swap one value?

[achalprogrammer]

i got solution/.... thanx JLBorges

[Dy7SLyTq]

i said i could it with one variable not one value.