Question

我已经编写了代码来存储2D数组中的值，如下所示格式，并且工作正常。

1. Menu1

   1.1 Menu1.1

   1.2 Menu1.2

2. Menu2

但我想将数组值存储在变量中，然后赋值变量（其中包含数组值）以填充MyPoints数组，它不起作用!!

//Create array
double MyPoints[25][3] = {{4,3,1},{6,4,1},{7,3,1},{7,6,1},{6,7.5,1},{3,6,1},{4,5,2},{5,6.5,2},{6,9,2},{3.5,8,2},{6,5,3},{6,6,3},{9,4,3},{9,5,3},{8,4,4},{9.5,3,4},{10,4,4},{11,6,4},{9,6,4},{8,7,5},{10,7,5},{11,9,5},{8,10,5}} ;
cout << "Array Filled" << endl;

// Print Array
    for (int c = 0; c < 25; c++)
    {
        for (int d = 0; d < 3; d++)
        {
            cout << MyPoints [c][d] << " Hellow ";
        }
        cout << endl;
    }

我做错了什么？如何纠正它。

Answer 1

#include <iostream>

int main()
{
    double MyPoints[25][3] = {{
        0,
    }};

    std::string text = "{4,3,1},{6,4,1},{7,3,1},{7,6,1},{6,7.5,1},{3,6,1},{4,5,2},{5,6.5,2},{6,9,2},{3.5,8,2},{6,5,3},{6,6,3},{9,4,3},{9,5,3},{8,4,4},{9.5,3,4},{10,4,4},{11,6,4},{9,6,4},{8,7,5},{10,7,5},{11,9,5},{8,10,5}";


    for (int c = 0; c < 25; c++)
    {
        std::sscanf(text.c_str(), "{%lf,%lf,%lf},", &MyPoints[c][0], &MyPoints[c][1], &MyPoints[c][2]);
        text = text.substr(text.find("},") + 2);
    }
    // Print Array
    for (int c = 0; c < 25; c++)
    {
        for (int d = 0; d < 3; d++)
            std::cout << MyPoints[c][d] << " Hellow ";
        std::cout << std::endl;
    }
}

不使用正则表达式或字符串流的代码（几乎是C，而不是C ++）。您还可以按std::cin >> M[x][y]或M[x][y]=value修改二维数组的值。

C ++使用变量初始化并填充2D数组

1 个答案: