Summary of C ++ operatpr heavy load

I am not talking nonsense much. The code is clear. I have been studying C ++ for three years. At that time, I have not paid much attention to many details. Now I have read Objective C ++ and found that I have missed many classic actions. -_-...

Class cpoint {<br/> int X, Y; <br/> Public: <br/> cpoint (int x, int y) <br/> {<br/> // cout <"constructer be call" <Endl; <br/> This-> X = X; <br/> This-> Y = y; <br/>}< br/> cpoint () {<br/> x = 1; <br/> Y = 1; <br/>}< br/> void operator ++ () // return value shocould be cpoint if u want to use (++ point ). display () <br/>{< br/> X ++; <br/> Y ++; <br/>}< br/> friend cpoint operator ++ (cpoint & point, INT) <br/>{< br/> cpoint te MP = point; <br/> point. X ++; <br/> point. Y ++; <br/> return temp; <br/>}< br/> cpoint & operator -- () <br/>{< br/> X --; <br/> Y --; <br/> return * This; <br/>}< br/> cpoint * operator -- (INT) <br/>{< br/> cpoint * temp = new cpoint (x, y); // stack memory, it will not be free until you delete or program exit <br/> // call New get memory first, and then call the constructor <br/> X --; <br/> Y --; <br/> return temp; <br/>}< br /> Cpoint operator + (cpoint point) // (point + point2 ). display () to do that, you must return cpoint <br/>{< br/> cpoint temp (x, y); <br/> temp. X + = point. x; <br/> temp. Y + = point. y; <br/> return temp; <br/>}< br/> cpoint & operator + = (cpoint point) <br/> {<br/> X + = point. x; <br/> Y + = point. y; <br/> return * This; <br/>}< br/> cpoint operator = (cpoint & Point) // can not be extend. no friend, no victurl <br/>{< br/> X + = Point. x; <br/> Y + = point. y; <br/> return * This; // return for method (point = point + point2 ). display (); <br/>}< br/> operator double () // with out return value, no friend <br/>{< br/> return (double) x/y; <br/>}</P> <p> void * operator new (size_t size) // must return void *, when you use new cpoint (X, y), it will be call. <br/>{< br/> cout <"Size:" <size <Endl; <br/> // return malloc (size ); // they need memory <br/> re Turn: Operator new (size); <br/>}< br/> void * operator new [] (size_t size) <br/> {<br/> cout <"new [] size:" <size <Endl; <br/> return: Operator new (size ); <br/>}< br/> void * operator new (size_t size, int num1, char * Str) <br/>{< br/> cout <"Num: "<num1 <" str: "<STR <Endl; <br/> return malloc (size ); <br/>}< br/> void operator Delete (void * P, size_t size) <br/> {<br/> cout <"Call Delete" <size <Endl; <br/> // fr EE (p );. <br/>: Operator Delete (p); <br/>}< br/> void operator Delete (void * P, int num1, char * Str) //???? <Br/>{< br/> cout <"Call Delete 2" <Endl; <br/> free (P ); <br/>}< br/> void operator Delete [] (void * P, size_t size) <br/> {<br/> cout <"Call Delete []" <size <Endl; <br/>: Delete [] P; // It will delete all the array <br/>}< br/> void operator [] (INT index) <br/>{< br/> cout <index <Endl; <br/>}< br/> ~ Cpoint () <br/>{< br/> // cout <"Call destructer" <Endl; <br/>}< br/> void display () <br/> {<br/> cout <"X:" <x <"Y:" <Y <Endl; <br/>}</P> <p >}; </P> <p> class cpointchilden: Public cpoint {<br/> int Z; <br/> public: <br/> cpointchilden (int x, int y, int Z): cpoint (x, y) <br/>{< br/> This-> Z = z; <br/>}< br/>}; </P> <p> int main (INT argc, char * argv []) <br/>{< br/> cpoint point (1, 1); <br/> point. display (); <br/> (point ++ ). display (); <br/> point. display (); <br/> (point --)-> display (); // Memory leakage <br/> point. display (); <br/> (-- point ). display (); </P> <p> cpoint point2 (1, 2); <br/> point = point + point2; // (point + point2 ). display (); <br/> point. display (); </P> <p> cpointchilden point3 (7,8, 9); <br/> point3.display (); <br/> point3 ++; </P> <p> point3.display (); <br/> float num = point3; // It will use double () Firstly, and use (float ); <br/> cout <num <Endl; </P> <p> cpoint * point4 = new cpoint (3, 4); <br/> Delete point4; // Delete [] point4; Thay are different </P> <p> cpoint * point5 = new (0, "Hello world. ") cpoint (5, 6); <br/> Delete point5; </P> <p> cpoint * pointarray = new cpoint [3]; <br/> Delete [] pointarray; // ###### </P> <p> cout <Endl; <br/> cpoint pointarray2 [2]; // without call New or new []; <br/> pointarray2 [1] [2]; // 2 call operator [], you can also to do point2.operator [] (2 ); <br/> pointarray2 [1]. operator ++ (); // But operator ++, can not work <br/> pointarray2 [1]. display (); <br/> return 0; <br/>}