swaping two variables without third variable.

First Method

a=a+b;
b=a-b;
a=a-b;


Second Method

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


Third Method

a=a^b;
b=a^b;
a=a^b;

 

nice post too! this is too useful!

 

another thing i would like to add in this post i.e, Swappin using Pointer!
just declare a function before void main() and follow the codes!

Code:

void swap(int*,int*);
void main()
{
[i]Program Statement[/i]
}

void swap(int *i,int *j)
int k;
k=*i;
*i=*j;
*j=k;
printf("%d %d",*i,*j);
}

 

yes this is another smart way for swapping!

 

Thanks Pankaj!