C# 相当于 C++ mapstring,double

C#中的Map数据结构

csharp
// 创建一个Map对象
Dictionary studentGrades = new Dictionary();
// 添加键值对
studentGrades["John"] = 85.5;
studentGrades["Emily"] = 92.3;
studentGrades["Michael"] = 78.9;

csharp
// 获取某个键对应的值
double johnGrade = studentGrades["John"];
Console.WriteLine("John's grade: " + johnGrade);
// 修改某个键对应的值
studentGrades["Emily"] = 95.0;
Console.WriteLine("Emily's updated grade: " + studentGrades["Emily"]);

csharp
// 遍历Map中的键值对
foreach (KeyValuePair studentGrade in studentGrades)
{
    Console.WriteLine("Student: " + studentGrade.Key + ", Grade: " + studentGrade.Value);
}
// 删除某个键值对
studentGrades.Remove("Michael");
Console.WriteLine("After removing Michael: " + studentGrades.ContainsKey("Michael"));