[Dev-C++] problem with static casting (C++)

[Zheo <zh...@ho...>]

I´have wrote an example to show the differences between malloc and new 
(in fact, just to show that new calls constructors and malloc does not):

#include <iostream>
#include <string>
#include <cstdlib>

//Class definition

class A{

public:
    A();
    ~A();
    void setData(std::string s);
    std::string getData() const;

private:
    std::string data;
};

//Implementación de la clase
A::A():data("sin inicializar"){

   std::cout << "Constructor de A!" << std::endl;
}

A::~A(){
    std::cout << "Destructor de A!" << std::endl;
}

void A::setData(std::string s){
    data = s;
}
std::string A::getData() const {

    return  data;
}

  //Main program

int main(){

using std::cout;
using std::endl;
using std::cin;

A *ptr1, *prt2;

    cout << "Creamos los objetos uno con free (prt1) y otro con delete 
    (ptr2)" << endl;

    ptr1 =   (A*) std::malloc( sizeof (*ptr1) );

    prt2 = new A;

    cout << "Que contiene prt1?" << endl;

    //Ups!!
    ptr1->setData("we");
    cout << ptr1->getData() << endl;

    cout << endl;

    cout << "Y ptr2?" <<endl;
    cout << prt2->getData() <<endl;

    cout << "Ahora destruimos los objetos con free y delete" <<endl;

    free(ptr1);

    delete prt2;

    cin.get();

}

In the line: (where ptr1 is a pointer to datatype A)

    ptr1 =   (A*) std::malloc( sizeof (*ptr1) );

I MUST use a C-style casting, and if I try

    ptr1 =   static_cast<A*> std::malloc( sizeof (*ptr1) );


The compiler gives me the following error:

example1.cpp: In function `int main()':
example1.cpp:49: parse error before `::' token

What I´m doing wrong ? According this example from The C++ Programming 
Language it should work with a static casting, isn´t it?:

void f()
{
int* p = static_cast<int*>(malloc(100)) ; // new allocation used as ints
// ...
}


Thanks in advance
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