删除内存C++时触发断点

Question

在我的任务中，我需要输入一些关于存款人的数据，然后将他的金额增加 15%，但这不是重点。主要问题是它总是“触发断点”并将我转到此页面

分配内存的函数：

void allocateMemory(char*** szData, const int rows, const int words, const int max) { 
    for (int i = 0; i < rows; i++)
    {
        szData[i] = new char* [words]; //how many words in every row
        for (int j = 0; j < words; j++)
        {
            szData[i][j] = new char[max]; //maximum quantity of symbols in every word
        }
    }
}

我赋值的函数：

void assignFirst(char*** szData, const int rows, const int max) { 

    char* s1 = new char[max];  
    char* s2 = new char[max];
    char* s3 = new char[max];
    char* s4 = new char[max];
    char* s5 = new char[max];

    cin >> s1 >> s2 >> s3 >> s4 >> s5;

    for (int i = 0; i < rows; i++)
    {
        szData[i][0] = s1;
        szData[i][1] = s2;
        szData[i][2] = s3;
        szData[i][3] = s4;
        szData[i][4] = s5;
    }
}

删除记忆的函数：

void freeMemory(char*** szData, const int rows, const int words) { 
    for (int i = 0; i < rows; i++)
    {
        for (int j = 0; j < words; j++)
        {
            delete[] szData[i][j];
        }
    }

    for (int i = 0; i < rows; i++)
    {
        delete[] szData[i];
    }

    delete[] szData;
}

它在控制台中的外观以及出现问题的地方我该如何解决？ P.S。不能使用 string （必须是字符数组）或 vector 来完成，因为这是我的任务条件。是的，我知道 new 有点过时了

完整代码：

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <iomanip>
#include <conio.h> 

using namespace std;

void allocateMemory(char*** szData, const int rows, const int words, const int max);
void assignFirst(char*** szData, const int rows, const int max);
void print(char*** szData, const int rows, const int words);
void freeMemory(char*** szData, const int rows, const int words);

void main() {
    const int rowCount = 2;
    const int wordCount = 5; //number of words in every row
    const int maxWordLength = 10; 

    char*** szData = new char** [rowCount];

    allocateMemory(szData, rowCount, wordCount, maxWordLength);

    assignFirst(szData, rowCount, maxWordLength);
    print(szData, rowCount, wordCount);

    freeMemory(szData, rowCount, wordCount);
}

void allocateMemory(char*** szData, const int rows, const int words, const int max) { 
    for (int i = 0; i < rows; i++)
    {
        szData[i] = new char* [words]; //how many words in every row
        for (int j = 0; j < words; j++)
        {
            szData[i][j] = new char[max]; //maximum quantity of symbols in every word
        }
    }
}

void assignFirst(char*** szData, const int rows, const int max) { 

    char* s1 = new char[max];  
    char* s2 = new char[max];
    char* s3 = new char[max];
    char* s4 = new char[max];
    char* s5 = new char[max];

    cin >> s1 >> s2 >> s3 >> s4 >> s5;

    for (int i = 0; i < rows; i++)
    {
        szData[i][0] = s1;
        szData[i][1] = s2;
        szData[i][2] = s3;
        szData[i][3] = s4;
        szData[i][4] = s5;
    }
}

void print(char*** szData, const int rows, const int words) { 
    for (int i = 0; i < rows - 1; i++) 
    {
        for (int j = 0; j < words; j++)
        {
            if (j == 3) //change fourth element
            {
                double a = atoi(szData[i][3]); //convert fourth element into double
                a = a * 1.15; //add 15% to it
                cout << a << " ";
            }
            else
                cout << szData[i][j] << " ";
        }
        cout << endl;
    }
}

void freeMemory(char*** szData, const int rows, const int words) { 
    for (int i = 0; i < rows; i++)
    {
        for (int j = 0; j < words; j++)
        {
            delete[] szData[i][j];
        }
    }

    for (int i = 0; i < rows; i++)
    {
        delete[] szData[i];
    }

    delete[] szData;
}

Answer 1

错误在这里

void assignFirst(char*** szData, const int rows, const int max) { 

    char* s1 = new char[max];  
    ...
    for (int i = 0; i < rows; i++)
    {
        szData[i][0] = s1;
        ...
    }
}

您将同一个指针分配给 szData 的多个条目。但是这里

for (int i = 0; i < rows; i++)
{
    for (int j = 0; j < words; j++)
    {
        delete[] szData[i][j];
    }
}

你删除那些指针，就好像它们都是单独分配的一样。

换句话说，您多次删除同一个指针，这就解释了错误。

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