Occurrence of letters in String

[nivedita prasad]

hi
Occurrence of letters in String. Get string from KB of any length & print letters coming maximum time first than second largest….. i.e in descending order.
program should be implemented using link list n dymami memory allocation.
Output look like if u enter string aababbbcba
b 5 times
a 4 times
c 1 times just like that


Regards
Nivedita Prasad

[newb16]

Not sure about "n dymami"(?) and link list part though. Also it prints most frequent in the bottom :(
#include <map>
#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
#define vbe(x)x.begin(),x.end()
typedef map<char,int>V;typedef multimap<int,char>S;
struct cx{V&Q;cx(V&v):Q(v){}void operator()(char q){if(Q.find(q)==Q.end())Q[q]=0;Q[q]++;}};
struct rcx{V&Q;S&T;rcx(V&v,S&q):Q(v),T(q){}void operator()(V::value_type x){T.insert(S::value_type(x.second,x.first));}};
struct pcx{S&Q;pcx(S&q):Q(q){}void operator()(S::value_type x){cout<<x.second<<" "<<x.first<<endl;}};
int main(){V v;string s;getline(cin,s);
{cx C(v); for_each(vbe(s),C);}
S q; {rcx C(v,q); for_each(vbe(v),C);}
{pcx C(q);for_each(vbe(q),C);}}