http://en.wikipedia.org/wiki/Ascii#ASCII_control_code_chart Binary Oct Dec Hex Abbr Unicode Control char C Escape code Name 0000000 000 0 00 NUL ␀ ^@ \0 Null character There’s no difference, but the more idiomatic one is ‘\0’. Putting it down as char c = 0; could mean that you intend to use it as a number (e.g. a counter). … Read more
This is illegal in C. Initializer lists must be constant compile time expressions. Do the following instead: int prm_arr[3]; prm_arr[0] = prm.field1; prm_arr[1] = prm.field2; prm_arr[2] = prm.field3;
Just as a brief answer, there are two usages for the static keyword when defining variables: 1- Variables defined in the file scope with static keyword, i.e. defined outside functions will be visible only within that file. Any attempt to access them from other files will result in unresolved symbol at link time. 2- Variables … Read more
Operator precedence is defined in the appropriate standard. The standards for C and C++ are the One True Definition of what exactly C and C++ are. So if you look closely, the details are there. In fact, the details are in the grammar of the language. For example, take a look at the grammar production … Read more
There is no difference in this case. However, you should prefer char *var;. This is because the * is associated more closely with the variable name and is not part of the base type. For example, if you do this: char* a, b; What you have is a, a pointer-to-char, and b, a char. This … Read more
For completeness there are several ways to achieve the “benefits” you might get from namespaces, in C. One of my favorite methods is using a structure to house a bunch of method pointers which are the interface to your library/etc.. You then use an extern instance of this structure which you initialize inside your library … Read more
Everything before standardization is generally called “K&R C”, after the famous book (1st edition and 2nd edition), with Dennis Ritchie, the inventor of the C language, as one of the authors. This was “the C language” from 1972-1989. The first C standard was released 1989 nationally in USA, by their national standard institute ANSI. This … Read more
The naive solution, of course, is to write a function for each enumeration that performs the conversion to string: enum OS_type { Linux, Apple, Windows }; inline const char* ToString(OS_type v) { switch (v) { case Linux: return “Linux”; case Apple: return “Apple”; case Windows: return “Windows”; default: return “[Unknown OS_type]”; } } This, however, … Read more