编写一个完整的程序，允许用户将商店的代码，名称和价格写入文件 . 然后，程序应该能够阅读，显示项目的详细信息，以及根据项目的代码搜索特定项目的详细信息 .

Here's my code that is incomplete:


   #include <iostream>
   #include <iomanip>
   using namespace std;
    int main()
     {
   //declare arrays
  string itemName[100];
   double itemCost[100] = {0.0};

   //declare variables
     string names = "";
     double total = 0;
     int numItems = 0;

     //number of items
      cout << "Enter number of grocery items you will be entering: ";
      cin >> numItems;
      cout << "\n";

        for (int i = 1; i <= 100; i++)
       {
      cin >> itemName[i] >> itemCost[i];
       }

         //input message
        cout << "Please enter the item names as one word only. Example: 
        tomatoes\n" ;
       cout << "Enter the cost as a decimal number. Example: 2.44\n\n";

       //item name and price input
     for (int i = 0; i < 3; ++i)
      {
        cout << "Enter item: ";
       cin >> itemName[i];
       cout << "Enter the cost of the " << itemName[i] << " $";
       cin >> itemCost[i];
       }

      cout << "\n";

   //Display Data
    for (int i = 0; i < 3; ++i)
   {
      cout << itemName[i];
     cout << ' ';
     cout << itemCost[i];
    cout << endl;
   }

    //total calculations
    for (int i = 1; i <= 3; i++)
       {
     total += itemCost[i];
      cout << total;
      }


    return 0;
    }
c++ file filestream