C++调试错误: HEAP_CORRUPTION_DETECTED

Question

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我不知道为什么我会得到这个错误。但我认为，当我从数据类创建临时对象时，问题时有发生。当我创建一个没有参数的对象时，自动设置大小为1。然后我设置temp.size =对象的大小。但我认为它只是暂时设定了大小。当我尝试调用sum_up函数时，temp再次等于1。我不知道，只是点子而已。你能帮帮我吗?

这是我的库文件；

#include <iostream>

using namespace std;

class dataclass {

private:
    int* data;
    int size;
public:
    dataclass(int size = 1) : size(size) {
        data = new int[size];
        cout << "Constructor works !" << endl;
        cout << "Created an array with" << size << " elements." << endl;
    }

    dataclass(const dataclass& k) {
        cout << "Copy constructor works! " << endl;
        this->size = k.size;
        data = new int[size];
        for (int i = 0; i < size; i++)
        {
            data[i] = k.data[i];
        }
        cout << "Created an arrray with " << k.size << " elements." << endl;
    }

    ~dataclass() { delete[] data; cout << "Destructor works. Array deleted" << endl; }

    const int* getData()const {
        return data;
    }

    int getSize() { return size; };
    void setSize(int size) { this->size = size; };
    void print()const
    {
        for (int i = 0; i < size; i++)
        {
            cout << data[i] << " ";
        }
        cout << endl;
    }

    void set(int idx, int value) {
        if (idx < size)
        {
            data[idx] = value;
        }
    }

    dataclass sum_up(const dataclass& k)const
    {
        if (size == k.size)
        {
            dataclass temp;
            temp.size = size;
            for (int i = 0; i < size; i++)
            {
                temp.data[i] = data[i] + k.data[i];
            }
            return temp;
        }
    }
};

和main.cpp

#include <iostream>
#include "DataClass.h"
using namespace std;
int main()
{
    dataclass k(3); // create an array with 3 elements (blank now)
    for (int i = 0; i < k.getSize(); i++)
    {
        k.set(i, i+2); 
        /* 
           fill the array with for loop; set the index elements like this;
           set(0,2)
           set(1,3)
           set(2,4)
        */
    }
    k.print(); // print the array's elements.

    dataclass k1 = k; // copy constructor
    k.print(); // again print k values
    k1.print(); // and created by copy constructor k1's values.
    cout << endl << endl;

    (k.sum_up(k1)).print(); // sum up the data



    return 0;
}

Answer 1

这个问题是由我创建temp对象的方式引起的。按如下方式更改代码修复了此问题：

    dataclass sum_up(const dataclass& k)const
    {
        if (size == k.size)
        {
            dataclass temp(size);
            for (int i = 0; i < size; i++)
            {
                temp.data[i] = data[i] + k.data[i];
            }
            return temp;
        }
    }