operator== (map) (STL/CLR)

發行項
06/10/2015

列出相等比較。

template<typename Key,
    typename Mapped>
    bool operator==(map<Key, Mapped>% left,
        map<Key, Mapped>% right);

參數

left
要比較的左邊容器。
right
要比較的右邊容器。

備註

只有當順序是由 left 和 right 具有相同的長度，而且對於每個位置的 i來說，left[i] == right[i]時，運算子函式才會傳回 true。您會用它來測試在這兩個maps是項目對項目的比較時， left 是否與 right 排序相同。

範例

// cliext_map_operator_eq.cpp 
// compile with: /clr 
#include <cliext/map> 
 
typedef cliext::map<wchar_t, int> Mymap; 
int main() 
    { 
    Mymap c1; 
    c1.insert(Mymap::make_value(L'a', 1)); 
    c1.insert(Mymap::make_value(L'b', 2)); 
    c1.insert(Mymap::make_value(L'c', 3)); 
 
// display contents " [a 1] [b 2] [c 3]" 
    for each (Mymap::value_type elem in c1) 
        System::Console::Write(" [{0} {1}]", elem->first, elem->second); 
    System::Console::WriteLine(); 
 
// assign to a new container 
    Mymap c2; 
    c2.insert(Mymap::make_value(L'a', 1)); 
    c2.insert(Mymap::make_value(L'b', 2)); 
    c2.insert(Mymap::make_value(L'd', 4)); 
 
// display contents " [a 1] [b 2] [d 4]" 
    for each (Mymap::value_type elem in c2) 
        System::Console::Write(" [{0} {1}]", elem->first, elem->second); 
    System::Console::WriteLine(); 
 
    System::Console::WriteLine("[a b c] == [a b c] is {0}", 
        c1 == c1); 
    System::Console::WriteLine("[a b c] == [a b d] is {0}", 
        c1 == c2); 
    return (0); 
    }