Re: STL map with key as a structure compare function issue
<firstname.lastname@example.org> schrieb im Newsbeitrag =
hi am facin a small problm,tried solving it, but my soln doesn't work.
cud u help me out.?
I need to maintain a map of <unsigned int, vector<int>>
here's wht i did - defined a class for storing the unsigned int  &
defined the corrspndng
compare function, the problem is that inspite of filling in the map
correctly, the find() returns an end - seems like the comparision
function's incorrect - but I can't seem to use a
If nothng works then I'd have to use a double as a key - but is there =
way out? I searched the net - but cudn't find an approp answer.
thanks a bunch!
here's the code
There is no iostream.h. Use #include <iostream> instead.
using namespace std;
bool operator() (const Keysq &a, const Keysq &b) const
return a.key < b.key;
unsigned int key;
/*ostream& operator<< (ostream& os, const Keysq& s)
typedef vector <int> df;
typedef map<Keysq,df,Keysq >assocMap;
k.key = 10; k.key = 20;
a.key = 123; a.key = 32;
assocMap s ;
s[k] = d;
s[a] = d;
itr = s.find(k);
cout << (itr == s.end())<<endl; // return a true!! l
Except for the two little bugs mentioned above, the program does as =
expected. It prints 0 as it should.
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