use of C-function 'strfry' in QT

[Misko]

Hi,

In a program i want to use the strfry-function. Therefor i've included string.h and used 'extern "C"' to be able to use this function.
But i don't think this is the right way to do it...

Anyone with an idea?
Regards,
Misko

[marcel]

Just include the header and use the function normally.

Regards

[Misko]

Hi,

In QDevelop i've done: #include <string> and then used the function like this:
lineEditFry->setText(strfry("Test"));
But it gives me a segmentation fault...

Regards,
Misko

[marcel]

Is lineEditFry allocated?

[Misko]

lineEditFry is made (allocated) via the QT-designer and stored in the ui-file...
Without the strfry-part it displays "Test" into lineEditFry.

[wysota]

Try this:

char *buf="Test";
lineEditFry->setText(strfry(buf));

char *buf="Test";
lineEditFry->setText(strfry(buf));

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Or:

std::string str = "Test";
char *dat = str.c_ptr();
std::random_shuffle(dat, dat+3);
lineEditFry->setText(dat);

std::string str = "Test";
char *dat = str.c_ptr();
std::random_shuffle(dat, dat+3);
lineEditFry->setText(dat);

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Or so the same with QByteArray instead of std::string if you're using Qt.

[Misko]

Even in C++ it gives me a segmentation fault:
#include <iostream>
#include <string>
using namespace std;
int main()
{
char *buf = "1235";
cout << strfry(buf) << endl;
}

I know this isn't a real QT-problem, but maybe you can help me out on this one!
I certainly would appreciate!

Regards,
Misko

[wysota]

This works for me:

#include <iostream>
#include <string>
 
int main(){
  char buf[16];
  strcpy(buf, "12345");
  std::cout << buf << std::endl;
  std::cout << strfry(buf) << std::endl;
  return 0;
}

#include <iostream>
#include <string>

int main(){
  char buf[16];
  strcpy(buf, "12345");
  std::cout << buf << std::endl;
  std::cout << strfry(buf) << std::endl;
  return 0;
}

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[Misko]

Works now!!!
strfry is a very handy function when it comes to randomizing strings or even integers, making random permutations possible...

Thanks!
Regards,
Misko

[wysota]

I'd say random_shuffle() is more flexible

[Misko]

I'll check it out!
Thx, Misko