Code::Blocks with -std=c++0x not accepting C++11 loops, pointers

ciphermagi · January 13th, 2012, 02:03 PM

I am using Code::Blocks 10.05 on Mint 11. For some reason, with the following code, I am not able to compile. If I comment out the C++11 range based for loop, it works fine aside from only giving me the output of the vector once.

Code:

#include <string>
#include <vector>
#include <iostream>

using namespace std;

int main(){
    vector<string> myVector = {"A first string", "A second string"};
    myVector.push_back("A third string");
    myVector.push_back("The last string in the vector");
    for(auto iterator = myVector.cbegin(); iterator != myVector.cend(); ++iterator)
        cout << *iterator << endl;
    for(auto& str : myVector)
        cout << str << endl;
    return 0;
}

Output is as follows:

Quote:

/home/ciphermagi/OOP/*** |In function âint main()â:|
/home/ciphermagi/OOP/*** |13|error: expected initializer before â:â token|
/home/ciphermagi/OOP/*** |15|error: expected primary-expression before âreturnâ|
/home/ciphermagi/OOP/*** |15|error: expected â;â before âreturnâ|
/home/ciphermagi/OOP/*** |15|error: expected primary-expression before âreturnâ|
/home/ciphermagi/OOP/*** |15|error: expected â)â before âreturnâ|
||=== Build finished: 5 errors, 0 warnings ===|

I have also attempted to use the following without success:

Code:

shared_ptr<int> myInt(new int);

Resulting in:

Quote:

/home/ciphermagi/OOP/*** ||In function âint main()â:|
/home/ciphermagi/OOP/*** |8|error: âshared_ptrâ was not declared in this scope|
/home/ciphermagi/OOP/*** |8|error: expected primary-expression before âintâ|
/home/ciphermagi/OOP/*** |8|error: expected â;â before âintâ|
||=== Build finished: 3 errors, 0 warnings ===|

I'm feeling like the whole C++11 library isn't installed, but I haven't been able to find a way to get a compiler that goes past GCC 4.5. Any suggestions?

Marc Gregoire · January 13th, 2012, 02:11 PM

With GCC 4.6 I get the following:

Code:

[marc@marc-fedora13 c++0x]$ cat range.cpp 
#include <string>
#include <vector>
#include <iostream>

using namespace std;

int main(){
    vector<string> myVector = {"A first string", "A second string"};
    myVector.push_back("A third string");
    myVector.push_back("The last string in the vector");
    for(auto iterator = myVector.cbegin(); iterator != myVector.cend(); ++iterator)
        cout << *iterator << endl;
    for(auto& str : myVector)
        cout << str << endl;
    return 0;
}
[marc@marc-fedora13 c++0x]$ /media/Disk2/gcc-4.6-20110205/bin/g++ -std=c++0x range.cpp 
[marc@marc-fedora13 c++0x]$ ./a.out 
A first string
A second string
A third string
The last string in the vector
A first string
A second string
A third string
The last string in the vector
[marc@marc-fedora13 c++0x]$

See if the following helps:
http://forums.codeblocks.org/index.php?topic=14942.0

ciphermagi · January 13th, 2012, 02:33 PM

Thanks for the blazing fast response. I do see that there is available a minGW build for gcc 4.6.1, but I was hoping for something that's not designed specifically for Windows. There doesn't seem to be any support for any compilers in linux under that thread, and I would prefer not to have to use wine just to be able to write code.

I would be willing to change IDE or even go with no IDE at all and just use command line linking if I can find something that stays away from having to emulate another OS in order to do this work.

Marc Gregoire · January 13th, 2012, 03:03 PM

I don't have much experience with Linux myself, but you should be able to install a new GCC package on your distribution.
If I look at http://community.linuxmint.com/software/view/gcc I see something called "Lisa (4:4.6.1-2ubuntu5)", maybe that's the GCC 4.6 compiler?
If not, you either need to find a 4.6 package somewhere for your linux distribution, or download the GCC source from http://gcc.gnu.org/ and compiler it yourself.

ciphermagi · January 19th, 2012, 08:41 PM

Actually, that's not up to date for 4.6, however I did find another person with Linux experience that was willing to point me in the right direction. In the interest of free information, here it is:

http://buildall.wordpress.com/2011/0...-ubuntu-10-10/

Edit:
Upon following the above instructions (and making changes as needed for version numbers) I am getting the correct output for the above range-based for loop.

Marc Gregoire · January 20th, 2012, 03:20 AM

That's good to hear :)