/*✨✨✨✨✨✨✨✨✨✨✨✨✨✨✨✨*\ programmed by: __ __ ___ _ _ _ __ _ ®© | \ / |/ \| |_| | / \ | \ | | | |\V/| | O | _ |/ Δ \| |\\| | |_| V |_|\___/|_| |_|_/ \_|_| \__| Created a Counter class to count occurence of elements in a vector or a string. \*✨✨✨✨✨✨✨✨✨✨✨✨✨✨✨✨*/ #include using namespace std; #define UDict unordered_map #define InitList initializer_list class Counter { UDict d; public: template Counter(InitList

l) { vector

v = l; for(auto ele : v) d[to_string(ele)]++; } Counter(InitList l) { vector v = l; for(auto s : v) d[s]++; } Counter(InitList l) { vector v=l; for(auto c : v) d[string(1, c)]++; } Counter(string s) { for(auto c:s) d[string(1,c)]++; } template auto operator[](Dt e) { string el = to_string(e); for(auto ele : d) if(ele.first == el) return ele.second; return 0; } auto operator[](char e) { auto el = string(1, e); for(auto ele : d) if(ele.first == el) return ele.second; return 0; } auto operator[](char e[]) { auto el = string(e); for(auto ele : d) if(ele.first == e) return ele.second; return 0; } friend auto Print(Counter c) { cout<<"Counter({"; for(auto ele : c.d) cout << ele.first << ": " << ele.second << ", "; cout << "})\n"; } }; int main() { auto c = Counter({1, 2, 4, 4, 5, 3, 8, 0, 3, 5, 9, 1, 1}); Print(c); cout << "how many 1 ? : " << c[1] << endl << "how many 7 ? : " << c[7]; }

Counter Class