hash_map::difference_type (STL/CLR)

帶正負號的距離，兩個元素之間的型別。

    typedef int difference_type;

備註

型別描述可能是負數的項目計數。

範例

// cliext_hash_map_difference_type.cpp 
// compile with: /clr 
#include <cliext/hash_map> 
 
typedef cliext::hash_map<wchar_t, int> Myhash_map; 
int main() 
    { 
    Myhash_map c1; 
    c1.insert(Myhash_map::make_value(L'a', 1)); 
    c1.insert(Myhash_map::make_value(L'b', 2)); 
    c1.insert(Myhash_map::make_value(L'c', 3)); 
 
// display contents " [a 1] [b 2] [c 3]" 
    for each (Myhash_map::value_type elem in c1) 
        System::Console::Write(" [{0} {1}]", elem->first, elem->second); 
    System::Console::WriteLine(); 
 
// compute positive difference 
    Myhash_map::difference_type diff = 0; 
    for (Myhash_map::iterator it = c1.begin(); it != c1.end(); ++it) 
        ++diff; 
    System::Console::WriteLine("end()-begin() = {0}", diff); 
 
// compute negative difference 
    diff = 0; 
    for (Myhash_map::iterator it = c1.end(); it != c1.begin(); --it) 
        --diff; 
    System::Console::WriteLine("begin()-end() = {0}", diff); 
    return (0); 
    } 
 

需求

標頭: < cliext/hash_map >

Namespace: cliext

請參閱

參考

hash_map (STL/CLR)

hash_map::size_type (STL/CLR)