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主なクラス:

#include <iostream>
#include <fstream>
#include <string>
#include "stockObject.h"

using namespace std;

int main()
{
    string line;
    stockObject stock("",0.0,0.0,0.0,0.0,0.0,0);

    ifstream inFile ("stockList.txt");
    if(inFile.is_open())
    {
        while (inFile.good() )
        {
            //getline(inFile, line);
            //cout << line ;
            cin >> stock;   
        }
        inFile.close();

    }
    else
    {
        cout << "Unable to open file" << endl;
    }
    cout << stock;

    system("Pause");
    return 0;
}

ストック オブジェクト ヘッダー:

#ifndef H_StockObject
#define H_StockObject
#include <string>
#include <iostream>
using namespace std;
class stockObject
{
    friend ostream& operator<< (ostream&, stockObject &);
    //allows the << operater to be used by the stockObject class

    friend istream& operator>> (istream&, stockObject &);
    //allows the >> operater to be used by the stockObject class

public:

    stockObject(string = "", double = 0.0, double = 0.0, double = 0.0, double = 0.0, double = 0.0, int = 0);
    // constructor for the object

    void setInfo(string, double, double, double, double, double, int);
    // function to set the info for the stock objects

    void printStock();
    // function to print the info that needs to be displayed by the stock object

    void showPrice() const;
    // displays the prices of stock objects

    double calculateGainLoss(double const, double const);
    //calculates the gain or loss of a stock object

    bool operator> (const stockObject&) const;
    bool operator< (const stockObject&) const;
    // allows for the comparasion of two stock objects
    double priceClose;
    double pricePrevious;

private:
    //declare all the variables for a stock object
    string stockSymbol;
    int numShares;
    double priceOpen;

    double priceHigh;
    double priceLow;

    double percentGainLoss;
};


#endif

ストックオブジェクトクラス:

#include "stockObject.h"

istream& operator>> (istream& isObject, stockObject& stock)
{
    isObject >> stock.stockSymbol >> stock.priceOpen >> stock.priceClose >> stock.priceHigh >> stock.priceLow >> stock.pricePrevious >> stock.numShares;

    return isObject;
}
ostream& operator<<(ostream& osObject, stockObject& stock)
{
    osObject << "Stock Symbol: " << stock.stockSymbol << ", Open: " << stock.priceOpen << ", Close: " << stock.priceClose << ", High: " << stock.priceHigh << ", Low: " << stock.priceLow << ", Previous Close: " << stock.pricePrevious << ", Percent Gain: " << stock.calculateGainLoss(stock.priceClose, stock.pricePrevious) << ", Volume: " << stock.numShares;
    return osObject;
}
stockObject::stockObject(string stockSymbol, double open, double close, double high, double low, double prevClose, int gainLoss)
{
    setInfo(stockSymbol, open, close, high, low, prevClose, gainLoss);
}
void stockObject::setInfo(string stockSymbol, double open, double close, double high, double low, double prevClose, int gainLoss)
{
    this->stockSymbol=stockSymbol;
    priceOpen=open;
    priceClose=close;
    priceHigh=high;
    priceLow=low;
    pricePrevious=prevClose;
    percentGainLoss=gainLoss;
}
void stockObject::printStock()
{
    cout << "Stock Symbol: " << stockSymbol << ", Open: " << priceOpen << ", Close: " << priceClose << ", High: " << priceHigh << ", Low: " << priceLow << ", Previous Close: " << pricePrevious << ", Percent Gain: " << calculateGainLoss(priceClose, pricePrevious) << ", Volume: " << numShares;
}
double stockObject::calculateGainLoss(double close ,double prevClose)
{
    return ((close-prevClose)/prevClose);
}

STOCKLIST.TXT ファイル:

ABC 123.45 130.95 132.00 125.00 120.50 10000

私はその多くのコードを知っていますが、エラーなしでこれを実行しますが、メインクラスのファイルを読み込んで、ファイルの内容をstockObjectに設定しようとすると、何が間違っているかについての情報やヘルプが表示されますこの時点で何をすべきか本当にわかりません。

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1 に答える 1

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あなたの行cin >> stock;は標準入力からの入力を求めます。ファイルから読み取るには、オブジェクトとオブジェクトで演算>>子を使用する必要があります。（他のすべてが正しく機能すると仮定しますが、私はチェックしていません）。istreamstockObjectinFile >> stock;

于 2013-05-22T06:07:18.160 に答える