jononanon's articles:

Items(21) /3 Next >> Last >|

Timer controlled process, influenced by "simultaneous" (decoupled) keyboard keypresses 6 41 (11/5/2012 10:06:30 PM) comp.lang.c Hello, how can one create a program, that runs some "timer controlled process", which is influenced by keypresses? Example: ============ The program reads a file like: 1.5 car 3.4 kitchen 10.7 fish ... John

Derivation of the C Standard's Formula for FLT_DIG, DBL_DIG, LDBL_DIG 9 22 (7/7/2012 8:05:51 AM) comp.lang.c Hi, have you seen the C Standards formula for FLT_DIG, DBL_DIG, LDBL_DIG? http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf#page=3D49 (pdf- page 49) If you have a capable browser, it can be di... John

Derivation of the C Standard's Formula for FLT_DIG, DBL_DIG, LDBL_DIG #2 0 42 (7/7/2012 7:48:51 AM) comp.lang.c Hi, have you seen the C Standards formula for FLT_DIG, DBL_DIG, LDBL_DIG? http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf#page=3D49 (pdf- page 49) If you have a capable browser, it can be di... John

Print numbers according to their native promoted type 16 32 (6/15/2012 7:06:50 PM) comp.lang.c Hi, the C library has weird number printing functions: sprintf(str, "%d", num_signed) sprintf(str, "%u", num_unsigned) I've created a nice macro SPRINTNUM(STR, EXPR), that handles this automatically,... John

Determining the 'type' of a variable, if only its name is given 13 43 (6/15/2012 8:47:55 AM) comp.lang.c Hi, is it possible, to determine the 'type' of a variable, if only its name is given. With 'type', I don't mean the exact type, such as enum, but instead the following information: a) sizeof b) signed... John

standard C? -> int b = ({int a; a = 5; a;}) 3 47 (6/14/2012 8:23:42 AM) comp.lang.c Hello, is it standard C... that the value obtained when evaluating a block is the last expression in the block?? Example: int b = ( { int a; a = 5; ... John

Programming "only" in an environment of C and it's friends - Being a toolsmith 55 43 (5/27/2012 7:32:50 PM) comp.lang.c Hi, in writing computer code, the language C has obvious advantages over other languages ("fads"): It's close to hardware. It's perfect for operating system interfacing. You can do anything with it. Of... John

Array addressing styles: arr[i].d[j] versus pArr->d[j], etc. 7 23 (5/27/2012 5:30:55 PM) comp.lang.c Hi! In writing code I often find numerous ways of expressing the same thing. I have some questions of "style" and "optimization" that I'd like to ask. Example1 ======== Variant 1a) arr[i].a = f1... John

condition true or false? -> (-1 < sizeof("test")) 53 24 (5/17/2012 8:40:08 AM) comp.lang.c Hello, please can someone explain why (-1 int main(void) { int i; if (-1 = -3; i--) { if (i #include #if EOF != -1 #error EOF is not -1 #endif int arr[UCHAR_MAX+2]... John

Possible occurrences of "char [3]" 13 33 (5/3/2012 9:03:18 PM) comp.lang.c Hi there, where could the following legally occurr in C code - not counting in strings ;) char [3] I can think only of: sizeof(char [3]); Are there any other possibilities? Thanks. ... John

jononanon's replies:

Items(15) /2 Next >> Last >|

Question from "The Standard C Library" - create a program with this line: x : ((struct x *)x)->x = x(5); 8 31 (4/29/2012 8:18:22 PM) comp.lang.c Hello, Exercise 0.2 (page 16) from "The Standard C Library" is: Create a program which contains this line x : ((struct x *)x)->x = x(5); An "easy" solution is given right at the bottom; but that is not t... jononanon (82)

Can *common* struct-members of 2 different struct-types, that are the same for the first common members, be accessed via pointer cast to either struct-type? 30 30 (5/2/2012 4:06:22 PM) comp.lang.c Assume identical common top struct members: struct a { int i1; char c1; short sa1[3]; }; struct b { int i2; char c2; short sa2[3]; int differ_here; }; struct a tmp; Are the following 2 lin... jononanon (82)

List of undefined behaviour and other sneeky bugs 56 34 (5/3/2012 5:04:16 PM) comp.lang.c 1) a[i] = i++; http://c-faq.com/expr/evalorder1.html So this attempt at optimisation is wrong: int i; int a[10]; for (i = 0; i < sizeof... jononanon (82)

Possible occurrences of "char [3]" 13 33 (5/3/2012 9:03:18 PM) comp.lang.c Hi there, where could the following legally occurr in C code - not counting in strings ;) char [3] I can think only of: sizeof(char [3]); Are there any other possibilities? Thanks. ... jononanon (82)

condition true or false? -> (-1 < sizeof("test")) 53 24 (5/17/2012 8:40:08 AM) comp.lang.c Hello, please can someone explain why (-1 int main(void) { int i; if (-1 = -3; i--) { if (i #include #if EOF != -1 #error EOF is not -1 #endif int arr[UCHAR_MAX+2]... jononanon (82)

Array addressing styles: arr[i].d[j] versus pArr->d[j], etc. 7 23 (5/27/2012 5:30:55 PM) comp.lang.c Hi! In writing code I often find numerous ways of expressing the same thing. I have some questions of "style" and "optimization" that I'd like to ask. Example1 ======== Variant 1a) arr[i].a = f1... jononanon (82)

Determining the 'type' of a variable, if only its name is given 13 43 (6/15/2012 8:47:55 AM) comp.lang.c Hi, is it possible, to determine the 'type' of a variable, if only its name is given. With 'type', I don't mean the exact type, such as enum, but instead the following information: a) sizeof b) signed... jononanon (82)

Print numbers according to their native promoted type 16 32 (6/15/2012 7:06:50 PM) comp.lang.c Hi, the C library has weird number printing functions: sprintf(str, "%d", num_signed) sprintf(str, "%u", num_unsigned) I've created a nice macro SPRINTNUM(STR, EXPR), that handles this automatically,... jononanon (82)

Derivation of the C Standard's Formula for FLT_DIG, DBL_DIG, LDBL_DIG 9 22 (7/7/2012 8:05:51 AM) comp.lang.c Hi, have you seen the C Standards formula for FLT_DIG, DBL_DIG, LDBL_DIG? http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf#page=3D49 (pdf- page 49) If you have a capable browser, it can be di... jononanon (82)

Timer controlled process, influenced by "simultaneous" (decoupled) keyboard keypresses 6 41 (11/5/2012 10:06:30 PM) comp.lang.c Hello, how can one create a program, that runs some "timer controlled process", which is influenced by keypresses? Example: ============ The program reads a file like: 1.5 car 3.4 kitchen 10.7 fish ... jononanon (82)