Re: Does anyone face this problem?

[Guy Harrison]

Vijay Patil wrote:

> Hi all,
>     Im using
> gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-20)
> on 64bit linux server

Could just be me "catching up" (bad power), na...

> im trying to compile following code
> --------------------sam.cpp---------------------
> #include <string>
> #include <iostream>
> #include <stdarg.h>
> using namespace std;
> 
> void Write( const char* msg, const char* msg2, ...)
> {
>     cout <<msg <<" "<<msg2<<endl;
> }
> 
> int main()
> {
>     string str("World");
>     Write("Hello","Debug out %s"  ,str);

Delphi? C passes Right-to-left tradionally. Forget it (I don't mean delphi)
unless very specific reason (ie: see VCL <-> delphi <-> BCB).

%s = C string

"string" (better std::string)

>     return 0;
> }
> -------------------------------------------
> 
> When i compile this code i get following compilation
> error
> 
> [oracle@sahyagiri test]$ g++ sam.cpp
> sam.cpp: In function `int main()':
> sam.cpp:17: warning: cannot pass objects of non-POD
> type `struct std::string'
>    through `...'; call will abort at runtime
> 
> When i run the executable, a.out it fails with Illegal
> instruction eror
> 
> [oracle@sahyagiri test]$ ./a.out
> Illegal instruction
> [oracle@sahyagiri test]$
> 
> Did any one face this problem, if yes is there any one
> workaround to this problem.

"std::string" isn't compatible with C string type. It does have a method
though...

printf("%s\n",str.c_str());

...much better...

#include <iostream>
#include <string>
#include <cstdlib>

int
main()
{std::string str ("World");

 std::cout << "Hello, Debug out " << str << std::endl;
 return EXIT_SUCCESS;
}


> i guess this is a issue with compiler gcc 3.2.3
> 
> because i tries same this with gcc 2.95, though it
> gives warning while compilation, but executable runs
> with out any runtime error.

gcc moves further toward the standard. Lurk on alt.comp.lang.learn.c-c++ for
standard issues. Compiler options: (-ansi -pedantic -W -Wall -Werror) hints
here.

<hint>
AnsiString x("foo");
std::string y;

y = x.c_str();
x = y.c_str();

BCB VCL has trouble handling expection that aren't "Exception" based (they
"escape/abort the GUI" (have your code inherit and rethrow).
</hint>