De-Int-a-Char

como puedo convertir un valor int a una cadena#include< iostream.h >

void portada();
void final();

main()
{
int nu=4;
char *n;
portada();
cout< < "Numero:";
cin > >nu;
n=itoa(nu, n, 10);
//n=(char *)malloc(nu);
cout< < "Numero:"< < n;
final();
system("PAUSE");


}

void portada(){
cout< < ("...............................................................................\a\n");
cout< < ("................******.*****.** **.*****.****.*****.*****..**................\a\n");
cout< < ("................ ** .** **.*** ***.** **.** .** **.**.**.***................\a\n");
cout< < ("................ ** .*****.*******.*****.****.*****.*****..**................\a\n");
cout< < ("................ ** .** **.** * **.** .** .*** ....**..**................\a\n");
cout< < ("................**** .** **.** **.** .****.** **....**.****...............\a\n");
cout< < ("...............................jamper91.hostei.com.............................\a\n");
cout< < ("\n");
};
void final(){
cout< < ("\n-------------------------------------------------------------------------------\a\n");
cout< < ("******************************************************************************\a\n");
cout< < (" Creado por jamper91@hotmail.com\n");
cout< < (" Cucuta Campeon\n");
cout< < ("******************************************************************************\a\n");
cout< < ("-------------------------------------------------------------------------------\a\n");
};