// (a) (ii)
Coords(float xx, float yy, float zz): x(xx), y(yy), z(zz)
Coords(float xx, float yy = 0.0, float zz = 0.0): x(xx), y(yy), z(zz)
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// (b) (i)
Undirectional: ++ only
Bidirectional: ++ and — only
Random access: full address arithmetic supported; +, +=, – and -=
Java’s for loop is a syntactic construct with a loop body
C++ for_each is a function; have to provide the “loop body” as an argument,
i.e. write it as a function whose name can be supplied to a call to for_each
Collection/array is supplied to for_each using start and end iterators
void doIt(string s)
{ if (s.length()>5)
cout << s << endl;
for_each(ls.begin(), ls.end(), doIt);
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