Thread: debugging: sigsegv, segmentation fault???

Hi, I'm relatively new to C programming, but have been working on producing a stats program as a way to experiment and put the things I've learnt into practice.

The program I have compiles perfectly, and the complier does not detect any errors. However, everytime I run the program it crashes.

I'm debugging with GDB, but haven't done any debugging before and don't really know what I'm seeing when I run the program through the debugger. Depending of whether I use scanf or gets to get the file name, I get one of the following two error messages a) "Program received signal sigsegv, segmentation fault, 0x780224ea in _size_of_stack_reserve__()" or b) "sigsegv, segmentation fault 0xbff7b983 in ?? ()".

I have no idea what this means, any help in interpreting it would be great. The source code that is failing is below.

Code:

void Create_New_Excavation_File ( void )
void Create_New_Excavation_File ( void )
{
     
     /* Constants */
     FILE *fp;
     

     /* Variables */
     char *filename;
     char *path = "C:\\path_to_folder";
     char *file_extension = ".txt";
     char *full_file_path;
     
     /* Get the file name */
     puts( "Please enter an appropriate name for the new file you wish to create" );
     scanf( "%s", &filename );
     
     printf("%s", filename );

     /*full_file_path = ( strcat ( path, filename, file_extension ) );*/

     printf("Creating File.....\n");
     
     fp = fopen ( full_file_path , "a" );
     fprintf ( fp, "\n Test text tester- Line two.");
     fclose ( fp );

I'm really lost at the moment so any help would be great.

Also is there a better way for me to get a file name and new file.