向量顯示錯誤

c++
vector

2013-05-04 65 views 0 likes

我有兩個簡單的類。我想用矢量顯示結果，但數字不顯示。另一方面，當我嘗試沒有向量的結果時，結果將顯示。你可以幫我嗎？謝謝。向量顯示錯誤

#include <iostream> 
#include <string> 
#include <vector> 
#include <iterator> 

using namespace std; 


template<typename T> 
class One 
{ 
protected: 
    T word; 
    T word2; 

public: 
    One() {word = "0"; word2 = "0";} 
    One(T w, T w2) {word = w; word2 = w2;} 
    virtual const void Show() {cout << word << endl; cout << word2 << endl;} 
}; 

template<typename T> 
class Two : public One<T> 
{ 
private: 
    int number; 
public: 
    Two() {number = 0;} 
    Two(T w, T w2, int n) : One(w,w2) {number = n;} 
    virtual const void Show() {cout << word << endl; cout << word2 << endl; cout << number << endl; } 
}; 


int main() 
{ 
    One<string> *idk; 
    Two<string> *something = new Two<string>("asd","aa",1); 
    idk = something; 

    idk->Show(); // OK - asd, aa, 1 

    vector<One<string>> arr; 
    arr.push_back(*idk); 
    arr.at(0).Show(); // WRONG - asd,aa 
    return 0; 
}

來源

2013-05-04 Facedown

請參閱[C++中的切片問題？]（http://stackoverflow.com/questions/274626/what-is-the-slicing-problem-in-c/274634#274634） – WhozCraig 2013-05-04 14:20:15

'：一個（ w，w2）{number = n; }'我想應該是'：一個（w，w2）{number = n;}' – 0x499602D2 2013-05-04 14:21:25