Given a value n > 0, write the decimal number n backwards (digit-wise), then a new line i.e. , and then write the same number forwards.

Write to the output stream out which has as default value std :: cout.

Use the function prototype

void writeBackwardForward (unsigned int n , std::ostream& out = std::cout);

The call writeBackwardForward(123456) outputs 654321 123456

Note that there is no new line after the last 6.

The call writeBackwardForward(10000) outputs 00001 10000

Note that there is no new line after the last 0