| Preprocessor |
| #include <stdio.h> |
includes contents of stdio.h |
| #error text |
display text as compile time error |
| #warning text |
display text as compile time warning |
| #pragma |
compiler specific options |
| #define M |
define M |
| #undef M |
undefine M |
| #if (condition) |
conditional compiling |
| #ifdef M |
compiled if M is defined |
| #ifndef M |
compiled if M is not defined |
| #elif (condition) |
conditional compiling |
| #else |
conditional compiling |
| #endif |
end conditional section |
| defined() |
is macro defined. |
| !defined() |
is macro not defined |
| M ## D |
combines M and D into MD |
| #M |
treat M as string "M" |
|
| Syntax |
| if (bool expr) block [else block] |
| for ([expr];[condition];[expr]) block |
| while (condition) block |
| do { } while (condition) |
| type identifier([type identifier, ...]); |
| type identifier([type identifier, ...]) { } |
| class identifier [:[private|public] type, ...]; |
| class identifier [:[private|public] type, ...] { [private:] }; |
| struct identifier [:[public|private] type, ...]; |
| struct identifier [:[public|private] type, ...] { [public:] }; |
| union identifier; |
| union identifier { type identifier; ... }; |
| enum identifier; |
| enum identifier { identifier [=int_value], ... }'; |
| typedef type identifier; |
|
