觉得cpp里面定义这个const_cast有点违规嫌疑,既然const了,干吗还要允许可以修改
?高人给点
拨点拨
// expre_const_cast_Operator.cpp
// compile with: /EHsc
#include
using namespace std;
class CCTest {
public:
void setNumber( int );
void printNumber() const;
private:
int number;
};
void CCTest::setNumber( int num ) { number = num; }
void CCTest::printNumber() const {
cout << "\nBefore: " << number;
const_cast< CCTest * >( this )->number--;
cout << "\nAfter: " << number;
}
int main() {
CCTest X;
X.setNumber( 8 );
X.printNumber();
}