unique_copy问题

[tan625747]

《c++ 程序设计语言》

#include <iostream>
#include <fstream>
#include <string>
#include <iterator>
#include <vector>
#include <algorithm>

using namespace std;
ostream_iterator<string> oo(cout);
istream_iterator<string> ii(cin);
istream_iterator<string> eos;

int main()
{
	string from,to;
	cin>>from>>to;

	ifstream is(from.c_str());
	istream_iterator<string>ii(is);
	istream_iterator<string>eos;

	vector<string>b(ii,eos);
	sort(b.begin(),b.end());

	ofstream os(to.c_str());
	ostream_iterator<string>oo(os,"\n");

	unique_copy(b.begin(),b.end(),00);
	return !is.eof()|| !os;
}

编译器：vs2010

错误

:\program files\microsoft visual studio 10.0\vc\include\xutility(2227): warning C4996: 'std::_Copy_impl': Function call with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators'
1>          c:\program files\microsoft visual studio 10.0\vc\include\xutility(2212) : see declaration of 'std::_Copy_impl'
1>          c:\documents and settings\administrator\my documents\visual studio 2010\projects\the c++ programming language\the c++ programming language\io.cpp(41) : see reference to function template instantiation '_OutIt std::copy<std::_Vector_iterator<_Myvec>,int>(_InIt,_InIt,_OutIt)' being compiled
1>          with
1>          [
1>              _OutIt=int,
1>              _Myvec=std::_Vector_val<std::string,std::allocator<std::string>>,
1>              _InIt=std::_Vector_iterator<std::_Vector_val<std::string,std::allocator<std::string>>>
1>          ]
1>c:\program files\microsoft visual studio 10.0\vc\include\xutility(2216): error C2665: 'std::_Copy_impl' : none of the 2 overloads could convert all the argument types
1>          c:\program files\microsoft visual studio 10.0\vc\include\xutility(2182): could be '_OutIt std::_Copy_impl<_InIt,_OutIt>(_InIt,_InIt,_OutIt,std::input_iterator_tag,std::output_iterator_tag)'
1>          with
1>          [
1>              _OutIt=int,
1>              _InIt=std::basic_string<char,std::char_traits<char>,std::allocator<char>> *
1>          ]
1>          c:\program files\microsoft visual studio 10.0\vc\include\xutility(2191): or       '_OutIt std::_Copy_impl<_InIt,_OutIt>(_InIt,_InIt,_OutIt,std::random_access_iterator_tag,std::random_access_iterator_tag)'
1>          with
1>          [
1>              _OutIt=int,
1>              _InIt=std::basic_string<char,std::char_traits<char>,std::allocator<char>> *
1>          ]
1>          while trying to match the argument list '(std::basic_string<_Elem,_Traits,_Ax> , std::basic_string<_Elem,_Traits,_Ax> , int, std::iterator_traits<_Iter>::iterator_category, std::iterator_traits<int>::iterator_category)'
1>          with
1>          [
1>              _Elem=char,
1>              _Traits=std::char_traits<char>,
1>              _Ax=std::allocator<char>
1>          ]
1>          and
1>          [
1>              _Elem=char,
1>              _Traits=std::char_traits<char>,
1>              _Ax=std::allocator<char>
1>          ]
1>          and
1>          [
1>              _Iter=std::basic_string<char,std::char_traits<char>,std::allocator<char>> *
1>          ]
1>          c:\program files\microsoft visual studio 10.0\vc\include\xutility(2227) : see reference to function template instantiation '_OutIt std::_Copy_impl<std::basic_string<_Elem,_Traits,_Ax>*,_OutIt>(_InIt,_InIt,_OutIt,std::tr1::false_type)' being compiled
1>          with
1>          [
1>              _OutIt=int,
1>              _Elem=char,
1>              _Traits=std::char_traits<char>,
1>              _Ax=std::allocator<char>,
1>              _InIt=std::basic_string<char,std::char_traits<char>,std::allocator<char>> *
1>          ]
1>          c:\documents and settings\administrator\my documents\visual studio 2010\projects\the c++ programming language\the c++ programming language\io.cpp(41) : see reference to function template instantiation '_OutIt std::copy<std::_Vector_iterator<_Myvec>,int>(_InIt,_InIt,_OutIt)' being compiled
1>          with
1>          [
1>              _OutIt=int,
1>              _Myvec=std::_Vector_val<std::string,std::allocator<std::string>>,
1>              _InIt=std::_Vector_iterator<std::_Vector_val<std::string,std::allocator<std::string>>>
1>          ]
1>
1>Build FAILED.
1>
1>Time Elapsed 00:00:00.92
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

[饭fan有引力]

书错了，看的书少，不好意思

[太乙]

// unique_copy example
#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;

bool myfunction (int i, int j) {
  return (i==j);
}

int main () {
  int myints[] = {10,20,20,20,30,30,20,20,10};
  vector<int> myvector (9);                            // 0  0  0  0  0  0  0  0  0
  vector<int>::iterator it;

  // using default comparison:
  it=unique_copy (myints,myints+9,myvector.begin());   // 10 20 30 20 10 0  0  0  0
                                                       //                ^

  sort (myvector.begin(),it);                          // 10 10 20 20 30 0  0  0  0
                                                       //                ^

  // using predicate comparison:
  it=unique_copy (myvector.begin(), it, myvector.begin(), myfunction);
                                                       // 10 20 30 20 30 0  0  0  0
                                                       //          ^

  myvector.resize( it - myvector.begin() );            // 10 20 30

  // print out content:
  cout << "myvector contains:";
  for (it=myvector.begin(); it!=myvector.end(); ++it)
    cout << " " << *it;

  cout << endl;

  return 0;
}

[太乙]

unique_copy(b.begin(),b.end(),00);-------oo吧~！

[tan625747]

[Quote=引用 3 楼 hqin6 的回复:]

unique_copy(b.begin(),b.end(),00);-------oo吧~！
[/Quote]]

谢了，看半天没有看出来

[aizibion]

将楼主
unique_copy(b.begin(),b.end(),00);
改为
unique_copy(b.begin(),b.end(),oo);
后，
vs2003：
------ 已启动全部重新生成: 项目: test, 配置: Debug Win32 ------

正在删除项目“test”(配置“Debug|Win32”)的中间文件和输出文件。
正在编译...
test.cpp
正在链接...

生成日志保存在“file://e:\Projects\Vs2003\test\test\Debug\BuildLog.htm”中
test - 0 错误，0 警告


---------------------- 完成 ---------------------

全部重新生成: 1 已成功, 0 已失败, 0 已跳过



vs2008
1>------ 已启动全部重新生成: 项目: test, 配置: Debug Win32 ------
1>正在删除项目“test”(配置“Debug|Win32”)的中间文件和输出文件
1>正在编译...
1>main.cpp
1>正在编译资源清单...
1>Microsoft (R) Windows (R) Resource Compiler Version 6.0.5724.0
1>Copyright (C) Microsoft Corporation. All rights reserved.
1>正在链接...
1>正在嵌入清单...
1>Microsoft (R) Windows (R) Resource Compiler Version 6.0.5724.0
1>Copyright (C) Microsoft Corporation. All rights reserved.
1>生成日志保存在“file://d:\My Documents\Visual Studio 2008\Projects\test\test\Debug\BuildLog.htm”
1>test - 0 个错误，0 个警告
========== 全部重新生成: 成功 1 个，失败 0 个，跳过 0 个 ==========