Question

In: Computer Science

#include <iostream> #include <string> #include <iomanip> #include <fstream> using namespace std; struct Product { string...

#include <iostream>
#include <string>
#include <iomanip>
#include <fstream>

using namespace std;
struct Product
{
   string itemname;
   int id;
   string itemcolor;
   double cost;
};

void fillProduct(Product[10], int& );//read data from a file and store in an array
void writeProduct(Product[10], int);//write the array into a file
void writeBinary(Product[10], int);//write the array into a file in binary mode
void printbinary(Product[10], int);//read data from the binary file and print

int main()
{
   Product myList[10];
   int numItems = 0;
   fillProduct(myList, numItems);
   writeProduct(myList, numItems);
   writeBinary(myList, numItems);
   printbinary(myList, numItems);
   return 0;
}

void fillProduct(Product myList[10], int& numItems)
{
   ifstream indata;
   indata.open("lab6data.txt");
   if (!indata)
   {
       cout << "Error opening file. Program aborting.\n";
   }
   else
   {
       string tname;
       getline(indata, tname);
       while (!indata.eof())
       {
           myList[numItems].itemname = tname;
           indata >> myList[numItems].id;
           indata.ignore();
           getline(indata, myList[numItems].itemcolor);
           indata >> myList[numItems].cost;
           indata.ignore();
           numItems++;
           getline(indata, tname);

       } // END WHILE
   }
   indata.close();
}

void writeProduct(Product myList[10], int numItems)
{
   ofstream outdata;
   outdata.open("output.txt");
   if (!outdata)
   {
       cout << "Error opening file. Program aborting.\n";
   }
   else
   {
       outdata << left;
       outdata << setw(15) << "Item Name"
           << setw(15) << "ID"
           << setw(15) << "Color"
           << setw(15) << "Cost" << endl;
       outdata << setw(15) << "---------"
           << setw(15) << "--"
           << setw(15) << "-----"
           << setw(15) << "----" << endl;
       for (int k = 0; k < numItems; k++)
       {
           outdata << setw(15) << myList[k].itemname
                   << setw(15) << myList[k].id
                   << setw(15) << myList[k].itemcolor
                   << setw(15) << myList[k].cost << endl;
       }
   }
   outdata.close();
}

void writeBinary(Product myList[10], int numItems)
{
   ofstream outbinary;
   outbinary.open("binary.dat", ios::binary);
   if (!outbinary)
   {
       cout << "Error opening file. Program aborting.\n";
   }
   else
   {
       for (int k = 0; k < numItems; k++)
       {
           //TODO Write a single statement below that writes data in myList[k] into binary.dat

       }

}
outbinary.close();
}

void printbinary(Product myList[10],int numItems) {
   ifstream inbinary;
   inbinary.open("binary.dat", ios::binary);
   if (!inbinary)
   {
       cout << "Error opening file. Program aborting.\n";
   }
   else
   {
       cout << left;
       cout<< setw(15) << "Item Name"
           << setw(15) << "ID"
           << setw(15) << "Color"
           << setw(15) << "Cost" << endl;
       cout << setw(15) << "---------"
           << setw(15) << "--"
           << setw(15) << "-----"
           << setw(15) << "----" << endl;

       for (int k = 0; k < numItems; k++)
       {
           //TODO Write a single statement below that read data from binary.dat and store them in myList[k].

           //TODO Print the data stored in myList[k], and the output should have the same format as the example in the instruction.

       }
   }
   inbinary.close();

}

Expert Solution

C++ code screenshot:

C++ code:

#include <iostream>
#include <string>
#include <iomanip>
#include <fstream>

using namespace std;
struct Product
{
    string itemname;
    int id;
    string itemcolor;
    double cost;
};

void fillProduct(Product[10], int &); //read data from a file and store in an array
void writeProduct(Product[10], int);  //write the array into a file
void writeBinary(Product[10], int);   //write the array into a file in binary mode
void printbinary(Product[10], int);   //read data from the binary file and print

int main()
{
    Product myList[10];
    int numItems = 0;
    fillProduct(myList, numItems);
    writeProduct(myList, numItems);
    writeBinary(myList, numItems);
    printbinary(myList, numItems);
    return 0;
}

void fillProduct(Product myList[10], int &numItems)
{
    ifstream indata;
    indata.open("lab6data.txt");
    if (!indata)
    {
        cout << "Error opening file. Program aborting.\n";
    }
    else
    {
        string tname;
        getline(indata, tname);
        while (!indata.eof())
        {
            myList[numItems].itemname = tname;
            indata >> myList[numItems].id;
            indata.ignore();
            getline(indata, myList[numItems].itemcolor);
            indata >> myList[numItems].cost;
            indata.ignore();
            numItems++;
            getline(indata, tname);

        } // END WHILE
    }
    indata.close();
}

void writeProduct(Product myList[10], int numItems)
{
    ofstream outdata;
    outdata.open("output.txt");
    if (!outdata)
    {
        cout << "Error opening file. Program aborting.\n";
    }
    else
    {
        outdata << left;
        outdata << setw(15) << "Item Name"
                << setw(15) << "ID"
                << setw(15) << "Color"
                << setw(15) << "Cost" << endl;
        outdata << setw(15) << "---------"
                << setw(15) << "--"
                << setw(15) << "-----"
                << setw(15) << "----" << endl;
        for (int k = 0; k < numItems; k++)
        {
            outdata << setw(15) << myList[k].itemname
                    << setw(15) << myList[k].id
                    << setw(15) << myList[k].itemcolor
                    << setw(15) << myList[k].cost << endl;
        }
    }
    outdata.close();
}

void writeBinary(Product myList[10], int numItems)
{
    ofstream outbinary;
    outbinary.open("binary.dat", ios::binary);
    if (!outbinary)
    {
        cout << "Error opening file. Program aborting.\n";
    }
    else
    {
        for (int k = 0; k < numItems; k++)
        {
            //TODO Write a single statement below that writes data in myList[k] into binary.dat
            outbinary.write((char *)&myList[k], sizeof(Product));
        }
    }
    outbinary.close();
}

void printbinary(Product myList[10], int numItems)
{
    ifstream inbinary;
    inbinary.open("binary.dat", ios::binary);
    if (!inbinary)
    {
        cout << "Error opening file. Program aborting.\n";
    }
    else
    {
        cout << left;
        cout << setw(15) << "Item Name"
             << setw(15) << "ID"
             << setw(15) << "Color"
             << setw(15) << "Cost" << endl;
        cout << setw(15) << "---------"
             << setw(15) << "--"
             << setw(15) << "-----"
             << setw(15) << "----" << endl;

        for (int k = 0; k < numItems; k++)
        {
            //TODO Write a single statement below that read data from binary.dat and store them in myList[k].
            inbinary.read((char *)&myList[k], sizeof(Product));
            //TODO Print the data stored in myList[k], and the output should have the same format as the example in the instruction.
            cout << setw(15) << myList[k].itemname
                 << setw(15) << myList[k].id
                 << setw(15) << myList[k].itemcolor
                 << setw(15) << myList[k].cost << endl;
        }
    }
    inbinary.close();
}

Output:

venereology answered 1 week ago

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