함수포인터

• 함수 정의

void cStyleFunction(int param){...}

class Aclass {
 void classFunction(int param){...}
 static void classStaticFunction(int param){...}
};

namespace NameSpace{
 void namespaceFunction(int param){...}
}

• 함수포인터 선언

void (*FunctionPointer) (int param);

typedef void (*TypedefFunctionPointer) (int param);

void (Aclass::*ClassFunctionPointer) (int param);

• 함수포인터 사용

void (*FunctionPointer) (int param);

void main(){
 void (*FunctionPointer) (int param);
 FunctionPointer = cStyleFunction; //ok
 FunctionPointer = Aclass::classStaticFunction; //ok
 FunctionPointer = NameSpace::namespaceFunction; //ok 
 FunctionPointer = Aclass::classFunction; //error
 FunctionPointer(param);
}

typedef void (*TypedefFunctionPointer) (int param);

typedef void (*TypedefFunctionPointer) (int param);
void main(){
 TypedefFunctionPointer tfp;
 tfp = cStyleFunction; //ok
 tfp = Aclass::classStaticFunction; //ok
 tfp = NameSpace::namespaceFunction; //ok
 tfp = Aclass::classFunction; //error
 tfp(param);
}

typedef void (Aclass::*ClassFunctionPointer) (int param);

void main(){
 Aclass *a = new Aclass();
 void (Aclass::*ClassFunctionPointer) (int param);
 ClassFunctionPointer = &Aclass::classFunction; //ok
 (a->*ClassFunctionPointer)(param);
}