STL

STL/STL-map/multimap.cpp

@@ -0,0 +1,31 @@
+#include <iostream>
+#include <map>
+using namespace std;
+
+bool cmp(int a, int b){
+	return a < b;
+}
+
+int main(){
+	auto cmpl = [](int a, int b){
+		return a > b;
+	};
+	multimap<int, string, bool(*)(int, int)> a(cmp);
+	multimap<int, string, decltype(cmpl)> b(cmpl);
+	a.insert({{1,"111"},{2,"222"},{1,"11"},{1,"1"},{2,"22"},{3,"333"}});//emplaceֻ<65><D6BB><EFBFBD><EFBFBD>make_pair<69><72><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><D6B1><EFBFBD><EFBFBD>ôд
+	//pair<const int, string><3E><>Key<65><79>const<73><74><EFBFBD>ε<EFBFBD> 
+	for(pair<int, string> x : a){
+		cout << x.first << ", " << x.second << " "; 
+	}
+	cout << endl;
+	cout << a.find(1)->second << " " << a.count(1) << endl; 
+	a.erase(a.find(1));
+	cout << a.find(1)->second << " " << a.count(1) << endl;
+	return 0;
+} 
+/*
+1, 111 1, 11 1, 1 2, 222 2, 22 3, 333
+111 3
+11 2
+*/
+