Pointer types
De cppreference.com
<metanoindex/>
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Sintaxe
cv type * cv identifier
|
(1) | ||||||||
return ( * identifier ) ( param_types )
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(2) | ||||||||
return ( class_name :: * identifier ) ( param_types ) cv_qualifier
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(3) | ||||||||
type & identifier
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(4) | ||||||||
type && identifier
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(5) | (desde C++11) | |||||||
Explicação
# Ponteiro para dados
Original:
# Pointer to data
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# Ponteiro para funcionar
Original:
# Pointer to function
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# Ponteiro para função de membro
Original:
# Pointer to member function
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# Referência
Original:
# Reference
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# R valor de referência
Original:
# r-value reference
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Notas
- Se cv é antes
*, o objeto pontiagudo para é afetado.Original:If cv is before*, the pointed-to object is affected.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - Se cv é depois
*, o ponteiro é afetado.Original:If cv is after*, the pointer is affected.The text has been machine-translated via Google Translate.
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Exemplo
#include <iostream>
struct Class
{
int data_member;
void member_function(int i) const
{
std::cout << "Member function: " << i << std::endl;
}
static void static_member_function ( int i )
{
std::cout << "Static member function: " << i << std::endl;
}
};
void global_function ( int i )
{
std::cout << "Global function: " << i << std::endl;
}
int main()
{
Class object;
Class *ptr = &object;
ptr->member_function(1);
Class &ref = object;
ref.data_member = 2;
std::cout << "object.data_member = " << object.data_member << std::endl;
void (Class::*ptr_to_memfun)(int) const = &Class::member_function;
(object.*ptr_to_memfun)(3);
(ptr->*ptr_to_memfun)(4);
void (*ptr_to_fun)(int) = Class::static_member_function;
ptr_to_fun(5);
ptr_to_fun = global_function;
ptr_to_fun(6);
}
Saída:
Member function: 1
object.data_member = 2
Member function: 3
Member function: 4
Static member function: 5
Global function: 6