This shows you the differences between two versions of the page.
|
address [2011/07/15 10:42] |
address [2022/04/16 12:22] (current) |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| + | @related: [[CPlusPlus]] [[ptr]] | ||
| + | |||
| + | allocation functions seems to work even if [[null]] pointer [[address]] passed as [[reference]] ? | ||
| + | |||
| + | |||
| + | <code> | ||
| + | #include <cstdio> | ||
| + | #include <cstdlib> | ||
| + | #include <iostream> | ||
| + | #include <string> | ||
| + | using namespace std; | ||
| + | |||
| + | #define cdebug cout | ||
| + | #define TRACE(x) { cdebug<<#x<<"="<<(x)<<endl; } | ||
| + | |||
| + | |||
| + | int falloc(char*& p, int & l) | ||
| + | { | ||
| + | cdebug<<__FILE__ <<":" <<__LINE__ << " ("<< __PRETTY_FUNCTION__<<")"<<endl; | ||
| + | cdebug<<(hex)<<(void*)&p<<endl; // non null address : ok | ||
| + | l=1; | ||
| + | p = new char[l]; | ||
| + | p[0]='1'; | ||
| + | } | ||
| + | |||
| + | int main(int argc, char* argv[]) | ||
| + | { | ||
| + | { | ||
| + | char* p = 0; int l=1; | ||
| + | TRACE( falloc(p,l) ); | ||
| + | cdebug<<p[0]<<endl; // ok:1 | ||
| + | } | ||
| + | { | ||
| + | char* p = (char*) "0"; int l=1; | ||
| + | TRACE( falloc(p,l) ); | ||
| + | cdebug<<p[0]<<endl; // ok:1 | ||
| + | } | ||
| + | exit(0); | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== misc ==== | ||
| + | |||
| + | * http://www.frogatto.com/?p=3 | ||
| + | * http://cslibrary.stanford.edu/104/ | ||
| + | * http://www.penspinning.fr/s777-at-thetournament-2011-3544 | ||