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Sen-Lung Chen
Guest
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 Posted: Thu Jul 28, 2005 3:50 pm Post subject: A question of iterator |
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There are two programs , hamming.cpp and counting.cpp
In hamming.cpp:
I define a function
int distance(vector<int> v1, vector<int> v2);
We propate two vector to this function and return hamming distance
In counting.cpp:
I write~~
vector < vector < int> > L10;
........
for (int m5=0; m5 < L10.size(); m5++)
{
int d2 = distance ( L10[m5],temp);
We transfet L10[m5] and temp(type is: vector < int> ) to this
function distance
However, error occurs when I compile using Dev-C++
The error seems like it must use iterator.
How should I fix the program ?
Thanks a lot.
The error meaasge is as below~~
error occut in this row (int d2..)
In instantiation of `std::iterator_traits<std::vector
std::allocator
| Quote: | ':
31 C:Dev-Cppcodecounting.cpp instantiated from here |
129 C:Dev-Cppincludec++3.4.2bitsstl_iterator_base_types.h no
type
named `iterator_category' in `class std::vector
std::allocator'
In stl_iterator_base_types.h, the content of 129 line is ~~
typedef typename _Iterator::iterator_category iterator_category;
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Victor Bazarov
Guest
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| Posted: Thu Jul 28, 2005 4:07 pm Post subject: Re: A question of iterator |
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Sen-Lung Chen wrote:
| Quote: | There are two programs , hamming.cpp and counting.cpp
In hamming.cpp:
I define a function
int distance(vector<int> v1, vector<int> v2);
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You'd be much better off passing those vectors by const refs:
int distance(vector<int> const& v1, vector<int> const& v2);
| Quote: | We propate two vector to this function and return hamming distance
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What's "propate"?
| Quote: | In counting.cpp:
I write~~
vector < vector < int> > L10;
.......
for (int m5=0; m5 < L10.size(); m5++)
{
int d2 = distance ( L10[m5],temp);
We transfet L10[m5] and temp(type is: vector < int> ) to this
function distance
However, error occurs when I compile using Dev-C++
The error seems like it must use iterator.
How should I fix the program ?
|
It can be as simple as the naming conflict. Try renaming your function.
The compiler probably sees the 'std::distance' function first. Name your
function like 'my_distance' or 'get_distance'.
| Quote: | Thanks a lot.
The error meaasge is as below~~
error occut in this row (int d2..)
In instantiation of `std::iterator_traits<std::vector
std::allocator
':
31 C:Dev-Cppcodecounting.cpp instantiated from here
129 C:Dev-Cppincludec++3.4.2bitsstl_iterator_base_types.h no
type
named `iterator_category' in `class std::vector
std::allocator'
In stl_iterator_base_types.h, the content of 129 line is ~~
typedef typename _Iterator::iterator_category iterator_category;
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V
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Sen-Lung Chen
Guest
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| Posted: Fri Jul 29, 2005 6:34 pm Post subject: Re: A question of iterator |
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Thanks a lot~~
I have solve this problem.
I want to type " propagate"
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