Not exactly. A char in C is an integer type 1 byte wide, just like int or short or what have you. So when you have a char variable (char foo), it's one of those 1 byte integers. A char array is a block of memory that the code treats as a series of chars. When you have a char array variable (char *foo or char foo[length]), the variable actually contains a pointer to the first char in the char array. Well usually the first char. In this case, he was trying to call a function that requires a char pointer using a char. That is why the compiler gave a warning, like "warning: passing arg 1 of `sprintf' makes pointer from integer without a cast". Because it was forced to convert the char to a pointer. --Palrich.
----- Original Message ----- From: "Davion Kalhen" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Saturday, December 20, 2003 10:30 PM Subject: RE: Confusing bug > > > Contrary to popular belief. sprintf does not allocate memory for variables. > char's are arrays, each spot holds a letter, the last spot of the array is > marked with \0. So char spell_buf; is an array with 1 spot. Your trying to > strap a spell into it. You can either malloc it, or just change "char > spell_buf;" to "char spell_buf[MSL]; > > Davion > > > >From: Cyhawk <[EMAIL PROTECTED]> > >To: [email protected] > >Subject: Confusing bug > >Date: Sat, 20 Dec 2003 18:57:17 -0800 > > > >Hey all, maybe someone can help me with this, this is part of my random > >item gen, pills specificly.. > > > >Anywho, its crashing with (cygwin) > >Program received signal SIGSEGV, Segmentation fault. > >0x610b7841 in memmove () from /usr/bin/cygwin1.dll > > > >and (in linux) > > > >Program received signal SIGSEGV, Segmentation fault. > >0x400beabc in _IO_str_overflow () from /lib/i686/libc.so.6 > > > >I am confused.. ive never seen this before.. > > > >As far as i can tell, i dont know whats causing this. While writing this > >email ;) i remembered somewhere else i saw something im trying to achive, > >so i changed the > >sprintf for the short descr to > > sprintf (prefix_full, "a small pill of %s", skill_table[spell_num].name); > >and it causes the same problems. > > > >Any help would be appreciated.. (oye im bad at this ;) > > > >-Thri > > > >Code snip below > > > > > > > > > >OBJ_DATA * > >thri_rand_item_pill (OBJ_DATA * obj, int level) > >{ > > char prefix_full[MSL]; > > int spell_num; > > char spell_buf; > > int find_spell = number_range(1, 2); > > > > switch (find_spell) > > { > > case 1: > > spell_num = skill_lookup ("detect invis"); > > sprintf( spell_buf, "detect invis"); > > break; > > case 2: > > spell_num = skill_lookup ("detect hidden"); > > sprintf( spell_buf, "detect hidden"); > > break; > > } > > obj = create_object (get_obj_index (30230), 0); > > obj->value[0] = level / 2; > > obj->value[1] = spell_num; > > > > sprintf (prefix_full, "a small pill of %s", spell_buf); > > obj->short_descr = str_dup (prefix_full); > > return(obj); > >} > > > > > >-- > >ROM mailing list > >[email protected] > >http://www.rom.org/cgi-bin/mailman/listinfo/rom > > _________________________________________________________________ > The new MSN 8: smart spam protection and 2 months FREE* > http://join.msn.com/?page=features/junkmail > http://join.msn.com/?page=dept/bcomm&pgmarket=en-ca&RU=http%3a%2f%2fjoin.msn.com%2f%3fpage%3dmisc%2fspecialoffers%26pgmarket%3den-ca > > > -- > ROM mailing list > [email protected] > http://www.rom.org/cgi-bin/mailman/listinfo/rom
