【STL】-Map/Multimap的用法

初始化：

map<string,double> salaries;

算法：

1. 赋值。salaries[ "Pat" ] = 75000.00;

2. 无效的索引将自动添加一项

cout << salaries[ "Jan" ] << endl;

3. Map的第一个或者第二个元素为数组的情况

代码：

 #include <map>
 #include <string>
 #include <iostream>
 using namespace std;

 int main( )
 {
     map<string,double> salaries;

     salaries[ "Pat" ] = 75000.00;
     cout << salaries[ "Pat" ] << endl;
     cout << salaries[ "Jan" ] << endl;

     map<string,double>::const_iterator itr;
     itr = salaries.find( "Jan" );
     if( itr == salaries.end( ) )
         cout << "Not an employee of this company!" << endl;
     else
         cout << itr->second << endl;

     return ;
 }

输出：

$ ./a.exe