Created
March 1, 2019 14:05
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CPP: Implementation of Sqr via templates
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| #include <iostream> | |
| #include <map> | |
| #include <utility> | |
| #include <vector> | |
| using namespace std; | |
| template <typename T> | |
| T Sqr(T x) { | |
| return x * x; | |
| } | |
| template <typename First, typename Second> | |
| pair<First, Second> Sqr(const pair<First, Second>& p) { | |
| return {Sqr(p.first), Sqr(p.second)}; | |
| } | |
| template <typename T> | |
| vector<T> Sqr(const vector<T>& v) { | |
| vector<T> result = {}; | |
| for (const auto& it : v) { | |
| result.push_back(Sqr(it)); | |
| } | |
| return result; | |
| } | |
| template <typename K, typename V> | |
| map<K, V> Sqr(const map<K, V>& m) { | |
| map<K, V> result = {}; | |
| for (const auto& it : m) { | |
| result[it.first] = Sqr(it.second); | |
| } | |
| return result; | |
| } | |
| int main() { | |
| vector<int> v = {1, 2, 3}; | |
| cout << "vector:"; | |
| for (int x : Sqr(v)) { | |
| cout << ' ' << x; | |
| } | |
| cout << endl; | |
| map<int, pair<int, int>> map_of_pairs = {{4, {2, 2}}, {7, {4, 3}}}; | |
| cout << "map of pairs:" << endl; | |
| for (const auto& x : Sqr(map_of_pairs)) { | |
| cout << x.first << ' ' << x.second.first << ' ' << x.second.second << endl; | |
| } | |
| return 0; | |
| } |
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