c++内部编译，代码如下哪里出问题了

Question

int main(){

char op;


while(cin >> op){


    int n;


    cin >> n;        


    //完成对整型的操作 


    int val;


    T_Vector<int> a(n), b(n);        


    for(int i = 0; i < n; ++i){


        cin >> val;


        a.append(val);//成员函数


    }        


    for(int i = 0; i < n; ++i){


        cin >> val;


        b.append(val);


    }        


    T_Vector<int> res(n);        


    if(op == '+'){


        res = a + b;//重载


    }else if (op == '-'){


        res = a - b;//重载


    } 


    res.print(); //成员函数


}


return 0;

}

Answer 1

上个题目的代码你修改了吗?
如果要动态申请内存的话，用这个：

#include<iostream>
using namespace std;
template<typename T>
class T_Vector {
public:
    T* p;
    int k;//i = 0, k = 0;
    T_Vector(T x = 0) { 
        k = 0;
        if(x==0)
            p = new T[100];
        else
            p = new T[x]; 
    };
    void  append(T m) { p[k] = m;k++; };
    void print() {
        for (int i = 0; i < k; i++/*;*/) { 
            if(i<k-1)
                cout << p[i] << " "; 
            else
                cout << p[i] << endl;
        }
    } 
    T_Vector operator +(T_Vector h) { T_Vector res(k+1);  for (int i = 0; i < k; i++/*;*/) { res.p[i] = p[i] + h.p[i]; }; return res; };
    T_Vector operator -(T_Vector h) { T_Vector res(k+1);  for (int i = 0; i < k; i++/*;*/) { res.p[i] = p[i] - h.p[i]; }; return res; };
};
int main() {
    char op;
    while (cin >> op) {
        int n;
        cin >> n;
        //完成对整型的操作 
        int val;

        T_Vector<int> a(n), b(n);

        for (int i = 0; i < n; ++i) {
            cin >> val;
            a.append(val);//成员函数
        }

        for (int i = 0; i < n; ++i) {
            cin >> val;
            b.append(val);
        }
        T_Vector<int> res(n);
        if (op == '+') {
            res = a + b;//重载
        }
        else if (op == '-') {
            res = a - b;//重载

        }
        res.print(); //成员函数
    }
    return 0;
}