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Problem implementing sorting algorithm in C with an array of structs


Problem implementing sorting algorithm in C with an array of structs

By : user3861816
Date : November 21 2020, 07:01 PM
will be helpful for those in need Apparently you're confusing an array of alumn structs with an array of pointers to alumm struct.
The Bubble logic expexts the array of pointers, whereby the main function seems to call it with an array of structs.
code :


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Problem with sorting array algorithm

Problem with sorting array algorithm


By : user2970663
Date : March 29 2020, 07:55 AM
I wish this helpful for you You are setting pricearray(i) to something that came from itemarray. You should be swapping pricearray(Locationsmallest) and pricearray(i), which you can do by storing the value of pricearray(Locationsmallest) in a temporary variable.
The same is true for quantityarray(i).
How to implement swapping of structs for the insertion sorting algorithm in C

How to implement swapping of structs for the insertion sorting algorithm in C


By : John Hodge
Date : March 29 2020, 07:55 AM
this will help I have a working insertion sort algorithm that sorts integers stored in an array. In a different program I have created a struct with words and a count. I need to sort structs stored in an array alphabetically using the same insertion sort. I understand how to compare them, however I cannot find a way to swap them. Ideas? , You can swap structs the same way that you swap integers:
code :
wordType tmp;
wordType a = {.word="hello", .count=5};
wordType b = {.word="world", .count=11};
tmp = a;
a = b;
b = tmp;
sorting a vector of structs using <algorithm>

sorting a vector of structs using <algorithm>


By : jaegeon
Date : March 29 2020, 07:55 AM
Any of those help It looks like myFunction in your example is member class function. It has to be static then to be a right predicate to the std::sort algorithm. Alternatively you can make this function a free outstanding function.
Or you can make a functor
code :
struct Sorter {
  bool operator ()( const Scores &o1, const Scores &o2) {
      return o1._score > o2._score;
  }
};
std::sort ( _scores.begin(), _scores.end(), Sorter());
C - Is sorting an array of pointers of structs slower than sorting the structs directly (qsort)

C - Is sorting an array of pointers of structs slower than sorting the structs directly (qsort)


By : C.Wooden
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , There are other issues here.
By creating the array of pointers you are fragmenting the memory. Algorithms in the standard libraries are designed to optimise the sorting of contiguous arrays, so by doing this you are probably missing the cache far more often than if you just had a bigger array.
Best sorting algorithm for sorting structs with byte comparisons?

Best sorting algorithm for sorting structs with byte comparisons?


By : Rabia Ahmed
Date : March 29 2020, 07:55 AM
Hope this helps I would imagine that STL will do what you want nicely. Re-writing your own sort routines and containers is likely to be error-prone, and slow. So only worry about if you find it's a bottleneck.
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