C++ programming involving swaping values of two variables.?

Question

C++ programming involving swaping values of two variables.?

Answer 1

the undertaking-unfastened occasion is the XOR swap, which comprises employing the bitwise XOR operator on the two values in a definite series. be conscious that this demands that the two values be in diverse memory places. See the link decrease than for an occasion. that's generally no longer a specifically sensible way in maximum certainly-international situations, because of the fact the utilising a short lived variable is likely rapid than utilising repeated XORs (that are no longer in a position to be parallelized).

Answer 2

Here is the basics.

Say you want to swap the values

of variables A and B. Use a third

variable C.

C = A

A = B

B = C

Answer 3

Why don't you try it yourself? This is painfully simple. Just pass the values by reference.

Answer 4

Here's a cool bit-hack:



say a and b are two variables.



after the operation:



a^=b^=a^=b;



a and b have swapped values!

Answer 5

Hi Edward,



The best way to learn any programming language is to give it a try yourself first. Anyways, you have been already answered. Nevertheless, I could not resist myself from posting this small program. The beauty of this program is that it does everything using just the 2 variables, without using a 3rd temporary variable. I have tried to code the program exactly as it is asked in the highschool, to make things as clear and lucid as possible. I hope next time you will give it a try.



# include

# include



void swap(int &m,int &n);



void main()

{

int a,b;

clrscr();

cout << "Enter two numbers " << endl;

cin >> a >> b;

cout << endl;

cout << "Before swapping the values are : " << endl;

cout << "The value of a is " << a << endl;

cout << "The value of b is " << b << endl << endl;

swap(a,b);

cout << "After swapping the values are : " << endl;

cout << "The value of a is " << a << endl;

cout << "The value of b is " << b << endl;

getch();

}



void swap(int &m,int &n)

{

m = m + n;

n = m - n;

m = m - n;



}



Peace and have a very good day !