set<> 的问题,路过就别错过了.(帮下忙吧)

[takile]

我写一个方法..传入一个MD5的值做为参数.(char *fileMD5)
方法的功能是如果set里没有传入那个MD5的值的话就插入一条.有的话就返回true;
是用set的find或count方法吧?

放入一个set<string>里的.如:

set<string> s1;
s1.insert("fsdf"); //这句话就报错了.

然后我用set<char[33]> s1,但编译错了..不是很懂.

麻烦高手帮下忙吧.

[sirguan]

看看下面的语句你能编译么？
string s = "test";
set< int > si;
si.insert( 1 );

[takile]

晕了..

可以了...

#include<string.h>
#include<string>

这两个有什么分别阿.?我刚才包含的是string.h,所以就错了.

taodm 谢谢了.给分.

[takile]

顶上阿....

[taodm]

你用的VC6？
s1.insert(string("fsdf"));

[fadics]

我试了,第一种方法没出错啊,正常执行了

[takile]

我用的是vs2005的..
s1.insert(string("fsdf")); 这句好像不行的.

我在方法里是这样写也不行的.
string tmp=fileMD5; //fileMD5为传入的char *fileMD5
s1.insert(tmp); //这句就报错了.

[taodm]

贴出错信息。

[takile]

set<string> MD5;
MD5.insert(string(fileMD5));


报以下错误.
-------------------------------------------------------------------------------------

d:\program files\microsoft visual studio 8\vc\include\functional(143) : error C2784: 'bool std::operator <(const std::_Tree<_Traits> &,const std::_Tree<_Traits> &)' : could not deduce template argument for 'const std::_Tree<_Traits> &' from 'const std::string'
d:\program files\microsoft visual studio 8\vc\include\xtree(1372) : see declaration of 'std::operator <'
d:\program files\microsoft visual studio 8\vc\include\functional(142) : while compiling class template member function 'bool std::less<_Ty>::operator ()(const _Ty &,const _Ty &) const'
with
[
_Ty=std::string
]
d:\program files\microsoft visual studio 8\vc\include\set(60) : see reference to class template instantiation 'std::less<_Ty>' being compiled
with
[
_Ty=std::string
]
d:\program files\microsoft visual studio 8\vc\include\xtree(26) : see reference to class template instantiation 'std::_Tset_traits<_Kty,_Pr,_Alloc,_Mfl>' being compiled
with
[
_Kty=std::string,
_Pr=std::less<std::string>,
_Alloc=std::allocator<std::string>,
_Mfl=false
]
d:\program files\microsoft visual studio 8\vc\include\xtree(68) : see reference to class template instantiation 'std::_Tree_nod<_Traits>' being compiled
with
[
_Traits=std::_Tset_traits<std::string,std::less<std::string>,std::allocator<std::string>,false>
]
d:\program files\microsoft visual studio 8\vc\include\xtree(94) : see reference to class template instantiation 'std::_Tree_ptr<_Traits>' being compiled
with
[
_Traits=std::_Tset_traits<std::string,std::less<std::string>,std::allocator<std::string>,false>
]
d:\program files\microsoft visual studio 8\vc\include\xtree(112) : see reference to class template instantiation 'std::_Tree_val<_Traits>' being compiled
with
[
_Traits=std::_Tset_traits<std::string,std::less<std::string>,std::allocator<std::string>,false>
]
d:\program files\microsoft visual studio 8\vc\include\set(69) : see reference to class template instantiation 'std::_Tree<_Traits>' being compiled
with
[
_Traits=std::_Tset_traits<std::string,std::less<std::string>,std::allocator<std::string>,false>
]
d:\avra项目\avra\avra\testmd5.cpp(9) : see reference to class template instantiation 'std::set<_Kty>' being compiled
with
[
_Kty=std::string
]
d:\program files\microsoft visual studio 8\vc\include\functional(143) : error C2784: 'bool std::operator <(const std::_Tree<_Traits> &,const std::_Tree<_Traits> &)' : could not deduce template argument for 'const std::_Tree<_Traits> &' from 'const std::string'
d:\program files\microsoft visual studio 8\vc\include\xtree(1372) : see declaration of 'std::operator <'
d:\program files\microsoft visual studio 8\vc\include\functional(143) : error C2784: 'bool std::operator <(const std::_Tree<_Traits> &,const std::_Tree<_Traits> &)' : could not deduce template argument for 'const std::_Tree<_Traits> &' from 'const std::string'
d:\program files\microsoft visual studio 8\vc\include\xtree(1372) : see declaration of 'std::operator <'
d:\program files\microsoft visual studio 8\vc\include\functional(143) : error C2784: 'bool std::operator <(const std::_Tree<_Traits> &,const std::_Tree<_Traits> &)' : could not deduce template argument for 'const std::_Tree<_Traits> &' from 'const std::string'
d:\program files\microsoft visual studio 8\vc\include\xtree(1372) : see declaration of 'std::operator <'
d:\program files\microsoft visual studio 8\vc\include\functional(143) : error C2784: 'bool std::operator <(const std::reverse_iterator<_RanIt> &,const std::reverse_iterator<_RanIt2> &)' : could not deduce template argument for 'const std::reverse_iterator<_RanIt> &' from 'const std::string'
d:\program files\microsoft visual studio 8\vc\include\xutility(1842) : see declaration of 'std::operator <'
d:\program files\microsoft visual studio 8\vc\include\functional(143) : error C2784: 'bool std::operator <(const std::reverse_iterator<_RanIt> &,const std::reverse_iterator<_RanIt2> &)' : could not deduce template argument for 'const std::reverse_iterator<_RanIt> &' from 'const std::string'
d:\program files\microsoft visual studio 8\vc\include\xutility(1842) : see declaration of 'std::operator <'
d:\program files\microsoft visual studio 8\vc\include\functional(143) : error C2784: 'bool std::operator <(const std::reverse_iterator<_RanIt> &,const std::reverse_iterator<_RanIt2> &)' : could not deduce template argument for 'const std::reverse_iterator<_RanIt> &' from 'const std::string'
d:\program files\microsoft visual studio 8\vc\include\xutility(1842) : see declaration of 'std::operator <'
d:\program files\microsoft visual studio 8\vc\include\functional(143) : error C2784: 'bool std::operator <(const std::reverse_iterator<_RanIt> &,const std::reverse_iterator<_RanIt2> &)' : could not deduce template argument for 'const std::reverse_iterator<_RanIt> &' from 'const std::string'
d:\program files\microsoft visual studio 8\vc\include\xutility(1842) : see declaration of 'std::operator <'
d:\program files\microsoft visual studio 8\vc\include\functional(143) : error C2784: 'bool std::operator <(const std::pair<_Ty1,_Ty2> &,const std::pair<_Ty1,_Ty2> &)' : could not deduce template argument for 'const std::pair<_Ty1,_Ty2> &' from 'const std::string'
d:\program files\microsoft visual studio 8\vc\include\utility(76) : see declaration of 'std::operator <'
d:\program files\microsoft visual studio 8\vc\include\functional(143) : error C2784: 'bool std::operator <(const std::pair<_Ty1,_Ty2> &,const std::pair<_Ty1,_Ty2> &)' : could not deduce template argument for 'const std::pair<_Ty1,_Ty2> &' from 'const std::string'
d:\program files\microsoft visual studio 8\vc\include\utility(76) : see declaration of 'std::operator <'
d:\program files\microsoft visual studio 8\vc\include\functional(143) : error C2784: 'bool std::operator <(const std::pair<_Ty1,_Ty2> &,const std::pair<_Ty1,_Ty2> &)' : could not deduce template argument for 'const std::pair<_Ty1,_Ty2> &' from 'const std::string'
d:\program files\microsoft visual studio 8\vc\include\utility(76) : see declaration of 'std::operator <'
d:\program files\microsoft visual studio 8\vc\include\functional(143) : error C2784: 'bool std::operator <(const std::pair<_Ty1,_Ty2> &,const std::pair<_Ty1,_Ty2> &)' : could not deduce template argument for 'const std::pair<_Ty1,_Ty2> &' from 'const std::string'
d:\program files\microsoft visual studio 8\vc\include\utility(76) : see declaration of 'std::operator <'
d:\program files\microsoft visual studio 8\vc\include\functional(143) : error C2676: binary '<' : 'const std::string' does not define this operator or a conversion to a type acceptable to the predefined operator

[takile]

我要放进set里的是char *fileMD5
如果我不写 set<string> 还有没有其他写法?
set<char[33]> 这样不行的.?(但编译不了)

[taodm]

呃，你没有#include <string>吧。

[takile]

有阿.
我包含了..但用insert这方法就出错了..

[taodm]

在我机器上，VC2005express ,没include <string>时出了你现在遇的错。
你自己再认真看看吧。