How to swap two variables, without using third variable ?
Answer Posted / xeon
To note on the answer about Perl, it uses a third variable
and just doesn't tell you. The C++ equivalent is:
//Our data
class exampleclass {};
exampleclass classa, classb;
int inta, intb;
float floata, floatb;
//Our swap function
template<class T>
void swap(T *a, T *b) {
T temp = *a;
a = b;
*b = temp;
}
//Our use of the swap function
swap<classexample>(classa, classb);
swap<int>(inta, intb);
swap<float>(floata, floatb);
And also note, Perl is an interpreted (Script) language, so
though it is simple and robust, it is less efficient than a
language that is compiled.
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