【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 0;
}

输出：

$ ./a.exe
75000
0
0