使用 C++ 函数将二维数组转换为文本

Question

我的愚蠢问题可能有一个简单的答案，但我现在似乎无法进行逻辑思考。

到目前为止，我有一个函数来创建一个二维数组（基于用户输入的维度）并为数组的每个元素生成一个随机数。

下一部分是我卡住的地方......

如何将此二维数组移动到另一个函数中，然后将其导出到文本文件中？

如果我是对的并且有一个简单的解决方案，你还能告诉我怎么做吗？我更像是一个视觉学习者。

-谢谢

# include  <iostream> 
# include  <fstream>
# include <string>
# include <ctime>

using namespace std;

void Array(int rows, int columns)
{
    int **Array = new int*[rows];
for (int i = 0; i < rows; ++i)
    Array[i] = new int[columns];

for (int y = 0; y < rows; y++)
{
    for (int x = 0; x < columns; x++)
    {
        Array[y][x] = rand();
    }
}
}

void File()
{

string Name;

cout << "Enter a file name you would like the array to be located under.\n";
cin >> Name;

Name = Name + ".txt";

ofstream fout(Name);

// This is where i would have the array inserted into the text file...

fout.close();
}


int main()
{
int rows, columns;

    cout << "Input the number of columns you would like to have in the array. \n";
    cin >> columns;
    cout << "Input the number of rows you would like to have in the array. \n";
    cin >> rows;

srand(time(NULL));

Array(rows, columns);
File();

system("pause");
return (0);
}

Answer 1

例如：

    using namespace std;

    int** Array(int rows, int columns)
    {
        int **Array = new int*[rows];

        for (int i = 0; i < rows; ++i)
            Array[i] = new int[columns];

        for (int y = 0; y < rows; y++)
        {
            for (int x = 0; x < columns; x++)
            {
                Array[y][x] = rand();
            }
        }

        return Array;
    }

    void File(int **arr, int rows, int columns)
    {

        string Name;

        cout << "Enter a file name you would like the array to be located under.\n";
        cin >> Name;
        Name = Name + ".txt";

        ofstream fout(Name.c_str());

        for (int y = 0; y < rows; y++)
        {
            for (int x = 0; x < columns; x++)
            {
                fout<<arr[y][x]<<" ";
            }

            fout<<endl;
        }

        fout.close();
    }


    int main()
    {
        int rows, columns;

        cout << "Input the number of columns you would like to have in the array. \n";
        cin >> columns;
        cout << "Input the number of rows you would like to have in the array. \n";
        cin >> rows;

        srand(time(NULL));

        int **array = Array(rows, columns);

        Array(rows, columns);

        File(array, rows, columns);

        system("pause");

        for (int y = 0; y < rows; y++)
        {
            delete []array[y];
        }

        delete []array;


        return (0);
    }

请注意，您忘记包含系统的 cstdlib 并且您不能在流的构造函数中传递字符串，您需要使用字符串的 c_str() 方法。在 Visual Studio 中，无需此更正即可工作，但也许这会有所帮助。 如果我们使用 new 我们需要使用 delete 来防止内存泄漏。

Answer 2

您可以使用相同的嵌套 for 循环将数组插入到文件中，而文件中则用于将值插入到数组中

Answer 3

for (int y = 0; y < rows; y++) { 
    for (int x = 0; x < columns; x++) { 
        // write Array[y][x] to file here
    }
}