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通过名单地图发布吗?
原标题:Iterate through a map of lists?

我有一张<条码>地图和带;图形、清单和带;int>“,我希望在名单上公布,并按数字打印。 我不断看到一个编辑错误,谈论的是召集人与召集人之间的转换。 我这样做有什么错误?

for (map<string, list<int> >::iterator it = words.begin(); it != words.end(); it++)
{
   cout << it->first << ":";
   for (list<int>::iterator lit = it->second.begin(); lit  != it->second.end(); lit++)
      cout << " " << intToStr(*lit);
   cout << "
";
}

error: conversion from
  ‘std::_Rb_tree_const_iterator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<int, std::allocator<int> > > >’
to non-scalar type
  ‘std::_Rb_tree_iterator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::list<int, std::allocator<int> > > >’
requested|
最佳回答
map<string, list<int> >::iterator

should be

map<string, list<int> >::const_iterator

您的《<条码>><>>>>>条码/代码>,或您的地图为<条码>>的成员,您在<条码>条码/代码>功能中重新命名该代码,该功能也使<条码><>>>>>>><条码>>><条码>>。 无论怎样,你都可以在<条码>-条码/代码>上拥有一个非<条码>。

EDIT:Am I是选择在auto上使用明确类型的人吗?

问题回答

使用新的C++11<代码>auto 关键词

for (auto it = words.begin(); it != words.end(); it++)
{
   cout << it->first << ":";
   for (auto lit = it->second.begin(); lit  != it->second.end(); lit++)
      cout << " " << intToStr(*lit);
   cout << "
";
}

如果你仍有错误,你就界定了不一致的类型。





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