# map map就像是python的dict,map就像一個對照表,一個key對上一個value,可以用中括號[]來得到對應的值,map也可以使用count()檢查某個值是否有對應值。 ```cpp= #include <iostream> #include <map> using namespace std; int main(){ map<int,string> m; m[1] = "one"; m[2] = "two"; m[3] = "three"; m[4] = "four"; cout << m.count(1) << endl;//存在輸出1 cout << m.count(5) << endl;//存在輸出0 cout << m[2] << endl;//output = two cout << m[3] << endl;//output = three return 0; } ```