How to draw a Flowchart of swaping of two numbers in c plus plus?

Answer 1

A proper flow chart for that purpose can't be depicted here, but the code would work as follows:

Given the two numbers, A and B:

C = A;

A = B;

B = C;

~if~ the numbers are integers, longs, or other types on which you can use an XOR operator (ie. not floats, doubles, etc.), then you could also do it this way:

A ^= B;

B ^= A;

A ^= B;

That is because of the way the binary XOR works. For example, let's say "A" is equal to to 12 and "B" is equal to 7:

A = 1100

B = 0111

If you run through those operations:

first A ^= B, now:

A = 1011

B = 0111

Now B ^= A:

A = 1011

B = 1100

and again, A ^= B:

A = 0111

B = 1100

or in decimal, A now equals seven, and B now equals twelve. Again, this will only work with fixed point values such as integers. You can't use it on floats.