Answer to Question #40860 in C++ for Mary Lohr
A function Swap_Char() that interchanges the values of two characters. The
function has two arguments,both of which are addresses of characters.The func-
tion does not return a value.
void Swap_Char(char& c1, char& c2)
char tmp = c1;
c1 = c2;
c2 = tmp;