?
Solved

Why do I get this error with "sort"?

Posted on 2011-03-05
10
Medium Priority
?
640 Views
Last Modified: 2013-12-14
The line of code is simply this:
sort(vVector1.begin(), vVector1.end(), SortVectorbySize);

Here's my problem.  I cut & pasted this line from another project where that one compiled without any problems with this line of code.....But in this project I get this error..

1>c:\documents and settings\administrator\desktop\copy of firstapp\firstapp\function.cpp(545) : error C2780: 'void std::sort(_RanIt,_RanIt)' : expects 2 arguments - 3 provided
1>        c:\program files (x86)\microsoft visual studio 9.0\vc\include\algorithm(3110) : see declaration of 'std::sort'

I looked up this website:

http://www.cplusplus.com/reference/algorithm/sort/

And it shows that the 3rd parameter can be a compare parameter...which is what it was in the other project that compiles successfully...why won't it work in my new project?
0
Comment
Question by:shaolinfunk
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 2
  • 2
  • +2
10 Comments
 
LVL 32

Accepted Solution

by:
phoffric earned 500 total points
ID: 35045082
Do you have another sort defined in your project?

Did you #include <algorithm> in your .cpp file?

If you right-click on "sort" and say go to definition, does it pick up only a 2 argument sort?

Does std::sort(...) solve the problem?

Does SortVectorbySize() take the same type as what the vector is holding?

Can you post a short (or long) program that reproduces the compiler error?
0
 
LVL 1

Assisted Solution

by:hogwell
hogwell earned 500 total points
ID: 35048007
Check the definition of SortVectorBySize.
Is it a function returning bool that takes two arguments that are the same as the elements of vVector1?

Perhaps the #include order has changed when you moved to the new compiler and the wrong SortVectorBySize definition is getting pulled in.

0
 
LVL 12

Assisted Solution

by:trinitrotoluene
trinitrotoluene earned 500 total points
ID: 35051196
>>>>>"what it was in the other project that compiles successfully...why won't it work in my new project"

has SortVectorbySize() been defined in your current project?
0
VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

 
LVL 35

Assisted Solution

by:sarabande
sarabande earned 500 total points
ID: 35055035
in <algorithm> of vc9 stl at line 3273 is a second template sort function taking a compare function as 3rd argument. so wrong stl version is not the problem but most likely wrong or missing prototype of sort function.

Sara

0
 
LVL 1

Author Comment

by:shaolinfunk
ID: 35055053
@trinitroluene

Yes, SortVectorbySize has been brought over from the working project into this current project, and defined.  It was cut & pasted verbatim.

I am still looking into this issue at this very moment...thanks for the helpful suggestions.
0
 
LVL 12

Expert Comment

by:trinitrotoluene
ID: 35063001
>>>error C2780: 'void std::sort(_RanIt,_RanIt)'

for some reason the compiler thinks you are calling the 2 argument function so this could be because it doesn't recognise your 3rd argument as a function pointer.

Try renaming the SortVectorbySize() function, make requisite changes in its prototype and definition and then use it in your std::sort call. See what error you get this time
0
 
LVL 1

Author Comment

by:shaolinfunk
ID: 35063246
Ok.  Acknowledged...I am still working on this problem, so I thank you for your input.  

Currently, I am debugging my way through my little app by creating an output log that will help me view more clearly what is going on.  I have some suspicions but cannot confirm until I see all of the output.
0
 
LVL 32

Expert Comment

by:phoffric
ID: 35063399
>> Currently, I am debugging my way through my little app
How did you build the program with that compiler error?
0
 
LVL 1

Author Comment

by:shaolinfunk
ID: 35066981
I didn't build with the error...I commented out the code causing the error and then built it.  

Once I can view the output at each step of my code I will eventually un-comment the error.
0
 
LVL 1

Author Comment

by:shaolinfunk
ID: 35072936
After a lot of debugging I found my error.

In my NEW project's header file SortVectorbySize() did NOT have static in front of it.  In the older project header file, where the code works, it did have static in front of it.

Thank you all for your clues...it definitely helped.  Everyone gets points.

Now, if someone could help me understand what 'static' does......I'll post that question in a new thread soon after I assign points.
0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Templates For Beginners Or How To Encourage The Compiler To Work For You Introduction This tutorial is targeted at the reader who is, perhaps, familiar with the basics of C++ but would prefer a little slower introduction to the more ad…
Programmer's Notepad is, one of the best free text editing tools available, simply because the developers appear to have second-guessed every weird problem or issue a programmer is likely to run into. One of these problems is selecting and deleti…
The goal of the video will be to teach the user the concept of local variables and scope. An example of a locally defined variable will be given as well as an explanation of what scope is in C++. The local variable and concept of scope will be relat…
The goal of the video will be to teach the user the difference and consequence of passing data by value vs passing data by reference in C++. An example of passing data by value as well as an example of passing data by reference will be be given. Bot…
Suggested Courses

762 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question