How to fix warning - Unbound scanf conversion

I am trying to use the following in my code :

int val;
val = sscanf ( line_pointer, "%u,%u %s %s", &unit_id, &subprogram_id, flags.get(), slotDescriptionPtr.get() );

But getting this warning with PC-Lint

 warning 498: unbounded scanf conversion specifier '[' may result in buffer overflow
   sscanf( value + 7, "%[^/]/%[^/]/%[^\n]", low, high, delta );

How to fix warning

• Use a width in each string conversion.

    // sscanf( value + 7, "%[^/]/%[^/]/%[^\n]", low, high, delta );
    char low[100];
    char high[100];
    char delta[100];
    sscanf( value + 7, "%99[^/]/%99[^/]/%99[^\n]", low, high, delta );
  

• Check the return value of sscanf().