core dump segmentation fault with C++ -

i newbie c/cpp application , analysing issue piece of c/cpp code. came across segmentation fault error , not identify root cause of segmentation fault.

please find scenario below:

union value {

    int value_int;    float value_float;    rwcstring *value_string; 

}

 void setvaluestring(const rwcstring &value_string_arg)  {    *(value.value_string) = value_string_arg; //value reference union value. } 

when application makes use of piece of code, generates segmentation fault @ runtime , terminates. placed few console output statements , understood segmentation fault may due

    *(value.value_string) = value_string_arg; 

line.

could please validate identification of segmentation fault? also, not pretty sure around issue. please let me know if has got thoughts on same.

any appreciated. thanks

~jegan

you want like:

value.value_string = new rwcstring(value_string_arg); 

in code, if value.value_string uninitialised pointer, assignment you're doing try write random part of memory, causing segmentation value. in code above, new operator allocates new block of memory rwcstring , calls copy constructor copy value_string_arg. assigns pointer newly allocated block of memory value.value_string.

don't forget delete value.value_string later when you're done avoid memory leak!