|Message: Re: the problem of SetRandomNumberStoreDir function in G4RunManager.hh||Not Logged In (login)|
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On Tue, 12 Oct 2010 15:21:18 GMT, Fada Guan wrote:
[ Regarding the system() call in G4RunManager: ]
> 2) Hope it will be fixed.
Hello again. I just realized that there is no actual bug in that code. You had reported:
> 2)system(shellCmd); > > shellCmd is a string, but not a const char*, which is the type of the argument > in the system function shown below: > > int system ( const char * command ); the reference is: > http://www.cplusplus.com/reference/clibrary/cstdlib/system/
I had responded to you about the string vs. char* issue. In fact shellCmd is of type G4String, which provides a large number of additional interface functions on top of its std::string base class. In particular, it provides "operator const char*()", which will do an automatic cast for the system() call you mention above.
The compiler warning you mentioned,
> /geant4/geant4.9.3.p02/source/run/include/G4RunManager.hh: In member function > ‘void G4RunManager::SetRandomNumberStoreDir(const G4String&)’: > geant4/geant4.9.3.p02/source/run/include/G4RunManager.hh:357: warning: > ignoring return value of ‘int system(const char*)’, declared with attribute > warn_unused_result
is caused by (as it says) disregaring the status-return from system().
Could you tell us which GCC version you are using?
In the latest versions, a number of "stylistic" warnings are generated, which rather exceed the standards of both the C and C++ languages (wanting extra parentheses with boolean operators, wanting empty braces on for-loops, and so on). The warning above sounds like more of the same.
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