Question

我的愚蠢问题可能有一个简单的答案，但我现在似乎无法在逻辑上思考。

到目前为止我所拥有的是创建2D数组（基于用户输入的维度）并为数组的每个元素生成随机数的功能。

下一部分是我被困的地方......

如何将此2D数组移动到另一个将其导出到文本文件中的函数？

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

-Thanks

# 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，你忘了为系统包含cstdlib而你不能在构造函数ofstream中传递字符串，你需要使用字符串的c_str（）方法。在视觉工作室中，如果没有这些更正，它将会工作，但这可能会有所帮助。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循环将数组插入到用于将值插入数组的文件中

Answer 3

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

使用c ++函数将2D数组转换为文本

3 个答案: