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Groups > comp.lang.c++ > #70664
| From | "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | Two silly problems |
| Date | 2019-12-26 16:47 +0100 |
| Organization | A noiseless patient Spider |
| Message-ID | <qu2kmo$6f4$1@dont-email.me> (permalink) |
Why, with the below code, do I get this result:
> echo no no no not ever | a
ever 1
no 1
not 1
I had expected a count of three for "no".
Also, how the feck does the commented line cause a Most Vexing Parse? I
was sure that by having a constructor call with `cin` as argument there,
i.e. a value argument, there could be no vexing parse. But g++ just
doesn't like it and then misleadingly complains about something later in
the code, using an avalanche of idiot diagnostics so as to ensure one
would waste time on it.
-------------------------------------------------
// Read a file of text, determine the n most frequently used words, and
print out a sorted
// list of those words along with their frequencies.
//
//
https://medium.com/@vgasparyan1995/a-little-bit-of-code-c-20-ranges-c6a6f7eae401
// Assuming
// * ASCII lowercase text
// * No punctuation.
#include <iterator>
#include <iostream>
#include <string>
#include <unordered_set>
template< class Key > using Multiset_ = std::unordered_set<Key>;
auto main()
-> int
{
using std::cin, std::cout, std::endl, std::string;
using Iit = std::istream_iterator<string>;
const Iit end = Iit();
Multiset_<string> words( Iit( cin ), (Iit()) ); // OK
//Multiset_<string> words( Iit( cin ), Iit() ); //! Most
vexing parse?
for( const string& s: words ) {
cout << s << ' ' << words.count( s ) << endl;
}
}
-------------------------------------------------
- Alf (possibly in superstupido-mode, for various reasons)
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Two silly problems "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2019-12-26 16:47 +0100
Re: Two silly problems "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2019-12-26 16:51 +0100
Re: Two silly problems Bo Persson <bo@bo-persson.se> - 2019-12-26 16:55 +0100
Re: Two silly problems "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2019-12-27 05:07 +0100
Re: Two silly problems Mr Flibble <flibble@i42.removethisbit.co.uk> - 2019-12-27 16:38 +0000
Re: Two silly problems "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2019-12-27 20:05 +0100
Re: Two silly problems Mr Flibble <flibble@i42.removethisbit.co.uk> - 2019-12-28 00:42 +0000
Re: Two silly problems "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2019-12-28 07:37 +0100
Re: Two silly problems Mr Flibble <flibble@i42.removethisbit.co.uk> - 2019-12-28 15:51 +0000
Re: Two silly problems boltar@nowhere.org - 2019-12-28 16:30 +0000
Re: Two silly problems Mr Flibble <flibble@i42.removethisbit.co.uk> - 2019-12-28 17:15 +0000
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