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Merge file using std::merge
Hi all,
The exercise says we need to merge two text files into a third one suing std::merge. Since that algorithm works only with iterators and only STL containers have iterators, one acceptable solution would be to save the files' contents into two STL containers and then merge the two using std::merge. Finally we can write the merged data back into a third text file.
Agree?
The exercise says we need to merge two text files into a third one suing std::merge. Since that algorithm works only with iterators and only STL containers have iterators, one acceptable solution would be to save the files' contents into two STL containers and then merge the two using std::merge. Finally we can write the merged data back into a third text file.
Agree?
Last edited on
Apparently, streams can also be iterators.
https://en.cppreference.com/w/cpp/iterator/istream_iterator
https://en.cppreference.com/w/cpp/iterator/istream_iterator
std::merge assumes sorted inputs. Are you making that assumption about the text files, @frek?
What are you merging? Characters, words, lines, numbers, ...?
What are you merging? Characters, words, lines, numbers, ...?
Apparently I can't use std::merge with files. The files consist of chars, integers, doubles etc. So I need to make use of an STL container which has begin() and end().
Can you post examples of your files, and what the sort criteria is to determine the ordering.
Texts like these"
Banana Trees 80 Pounds 123 Jack Sparrow Jungle surfer NYC the US Sony laptops 12 million 24 Frek troy C++ developer Bukan Kurdistan Toshiba PCes 8 million 32 Sara Kruze Java Programmer London the UK Asus PCes 11 million dollars 28 Tony Brown JavaScript Programmer WDC the US |
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