#include <iostream> using namespace std; class BaceClass { public: BaceClass(); }; BaceClass::BaceClass() { cout << "构造基类对象" << endl; }; class DerivedClass : public BaseClass { public: DerivedClass(); }; DerivedClass::DerivedClass() { cout << "构造派生类对象" << endl; } int main(int argc, char** argv) { DerivedClass d; return 0; }哪里错了

代码中有一个类名拼写错误，将 `BaceClass` 改为 `BaseClass` 即可，另外需要将基类的构造函数改为 `virtual`，否则派生类的构造函数不会调用基类的构造函数。

正确的代码如下：

#include <iostream>
using namespace std;

class BaseClass {
public:
    virtual BaseClass();
};

BaseClass::BaseClass() {
    cout << "构造基类对象" << endl;
};

class DerivedClass : public BaseClass {
public:
    DerivedClass();
};

DerivedClass::DerivedClass() {
    cout << "构造派生类对象" << endl;
}

int main(int argc, char** argv) {
    DerivedClass d;
    return 0;
}