Create map.cpp

Author: kc0112

STL/map.cpp

@@ -0,0 +1,77 @@
+#include<iostream>
+#include<map>
+#include<set>
+using namespace std;
+
+void display(const std::map<std::string,std::set<int>> &m)
+{
+    cout<<"[ ";
+    for(const auto &t:m)
+    {
+        cout<<t.first<<":[";
+        for(const auto & s:t.second)
+            std::cout<<s<<" ";
+        std::cout<<"]";
+    }
+    cout<<"]"<<endl;
+}
+
+template <typename T1,typename T2>
+void display(const std::map<T1,T2> &l)
+{
+    cout<<"[ ";
+    for(const auto &t:l)
+    {
+        cout<<t.first<<":"<<t.second<<" ";
+    }
+    cout<<" ]"<<endl;
+}
+
+void test1()
+{
+    cout<<"test1=========================="<<endl;
+    std::map<std::string,int>m{
+    {"Larry",3},{"Moe",1},{"Curly",2}};
+    display(m);
+    m.insert(std::make_pair("Anna",10));
+      display(m);
+    m["Joe"]=5;
+      display(m);
+    m["Frank"]=18;
+      display(m);
+    m["Frank"]+=10;
+      display(m);
+      m.erase("Frank");
+        display(m);
+        cout<<"Count for Frank:"<<m.count("Frank")<<endl;
+        cout<<"Count for Joe:"<<m.count("Joe")<<endl;
+        if(m.find("Larry")!=m.end())
+            cout<<"Found Larry"<<endl;
+        auto it=m.find("Larry");
+        if(it!=m.end())
+            cout<<it->first<<":"<<it->second<<endl;
+        m.clear();
+          display(m);
+      cout<<endl;
+}
+
+void test2()
+{
+    cout<<"test2=========================="<<endl;
+     std::map<std::string,std::set<int>>m{
+     {"Larry",{100,90}},{"Moe",{94}},{"Curly",{80,90,100}}};
+       display(m);
+       m["Larry"].insert(95);
+         display(m);
+         auto it=m.find("Moe");
+         if(it!=m.end())
+            it->second.insert(1000);
+           display(m);
+      cout<<endl;
+}
+
+int main()
+{
+    test1();
+    test2();
+}