爲3D數組中的特定元素創建對象

Question

我想通過指定3D數組中的特定元素來檢索兩個變量（例如：var4和var5）。

我目前正在嘗試通過創建特定元素的對象，然後創建一個類，該類根據特定元素指定的對象檢索name4和name5的值。有什麼想法嗎？

Answer 1

你的3D容器應該是private。然後，您的set()函數將採取 ColumnDepth作爲參數以及要放在這些座標中的實際Value或indexes並將其設置在私有容器中。隨着set()，您需要另一個功能是get()。 get()也應該採用三個參數，即indexes，它會從您的私有容器中檢索值。

使用此示例的想法，你會看到會發生什麼。

set(row, column, depth, value); // can be void 
RetrievedValue = get(row, column, depth) // should return something 

這是使用std::vector工作代碼基本代碼：

#include <iostream> 
#include <vector> 

using namespace std; 

class Whatever 
{ 
private: 
    vector<vector<vector<int>>> MyVec; // 3D vector 

public: 
    Whatever(int RowSize, int ColumnSize, int DepthSize); // default constructor 
    int get(int Row, int Column, int Depth); 
    void set(int Row, int Column, int Depth, int Value); 

}; 

Whatever::Whatever(int RowSize, int ColumnSize, int DepthSize) 
{ 
    vector<int> TempDepth; 
    vector<vector<int>> TempColumn; 

    for (int i = 0; i < RowSize; i++) 
    { 
     for (int j = 0; j < ColumnSize; j++) 
     { 
      for (int k = 0; k < DepthSize; k++) 
      { 
       TempDepth.push_back(0); // add an integer zero to depth on every iteration 
      } 
      TempColumn.push_back(TempDepth); // add the whole depth to the column 
      TempDepth.clear(); // clear 
     } 
     this->MyVec.push_back(TempColumn); // add the whole column to the row 
     TempColumn.clear(); // clear 
    } 
} 


int Whatever::get(int Row, int Column, int Depth) 
{ 
    return this->MyVec[Row][Column][Depth]; // "get" the value from these indexes 
} 

void Whatever::set(int Row, int Column, int Depth, int Value) 
{ 
    this->MyVec[Row][Column][Depth] = Value; // "set" the Value in these indexes 

} 


int main() 
{ 
    int rowSize, columnSize, depthSize; 

    cout << "Please enter your desired row size, column size and depth size:\n"; 
    cin >> rowSize >> columnSize >> depthSize; 

    Whatever MyObjectOfClassWhatever(rowSize, columnSize, depthSize); // create a local object and send the sizes for it's default constructor 

    // let's say you need "set" a value in [2][4][1] 
    MyObjectOfClassWhatever.set(2, 4, 1, 99); 

    // now you want to "get" a value in [2][4][1] 
    int RetreivedData = MyObjectOfClassWhatever.get(2, 4, 1); // you get it from within the class and assign it to a local variable 

    // now you can do whatever you want 

    return 0; 
}