-1

学生の記録を入力し、コマ区切りのファイルに保存する簡単なプログラムを書いています。すべてが良さそうに見えますが、プログラムを実行するとエラーが発生します。

エラー1エラーC2248：'std :: basic_ios <_Elem、_Traits> :: basic_ios'：クラスで宣言されたプライベートメンバーにアクセスできません' std :: basic_ios <_Elem、_Traits>'c：\ program files \ microsoft visual studio 10.0 \ vc \ include \ fstream11161プロジェクト1

コードは次のとおりです。

#include <cstring>
#include <iostream>
#include <fstream>
#include <string>
#include <cstdlib>

using namespace std;

void closeOrNewRecordMenu(string enterAnotherRecord)

    {
        if (enterAnotherRecord == "Q" && enterAnotherRecord == "q")
        {
        exit(0);
        }
    }

void newStudentRecord(double studentNumber, string firstName, string lastName, string campus, string course1, string course2, string course3, string seniorPracticum, ofstream writeToRecordsFile)

    {
        int campusChoice;
        do {
        cout << "Student's six digit number: (Numeric only)";
        cin >> studentNumber;
        cin.ignore();
        }
        while (studentNumber < 100000 && studentNumber > 999999);

        cout << "Student's first name: " << "\n";
        cin >> firstName;
        cin.ignore();

        cout << "Student's last name: " << "\n";
        cin >> lastName;
        cin.ignore();

        while (campusChoice < 1 || campusChoice > 3)

        cout << "Which campus will " << firstName << " " << lastName << " be attending class at: " << "\n";

        cout << "For the North campus enter 1" << "\n";

        cout << "For the South campus enter 2" << "\n";

        cout << "For the Seaside campus enter 3" << "\n";

        cin >> campusChoice;
        cin.ignore();

        if (campusChoice == 1)
            {
                campus = "North Campus";
        }

        else if (campusChoice == 2)
        {
            campus = "South Campus";
        }

        else if (campusChoice == 3)
        {
            campus = "Seaside Campus";
        }
        else {
            cout << "Please enter a valid choice." << "\n" << "\n";
        }

        cout << "Student's first course: " << "\n";
        getline (cin, course1);
        cin.ignore();

        cout << "Student's second course: " << "\n";
        getline (cin, course2);
        cin.ignore();

        cout << "Student's third course: " << "\n";
        getline (cin, course3);
        cin.ignore();

        do {
        cout << "Is " << firstName << " " << lastName << " a senior this year? Please enter \"Y\" for yes and \"N\" for no." << "\n";
        cin >> seniorPracticum;
        cin.ignore();
        } while (seniorPracticum != "y" && seniorPracticum != "Y" && seniorPracticum != "n" && seniorPracticum != "N");

        writeToRecordsFile << studentNumber << "," << firstName << "," << lastName << "," << campus << "," << course1 << "," << course2 << "," << course3 << "," << seniorPracticum << "\n";

        cout << "The student record for " << firstName << " " << lastName << " has been saved." << "\n" << "\n";
}

int main()

    {
         cout << "Hello there! Welcome to the student record manager. From here you can enter new student information and save it to a file!!!! (More exciting to the developer than the user)." << "\n" << "\n";

    string enterAnotherRecord;

    ofstream writeToRecordsFile;

    writeToRecordsFile.open("cop2224_proj1.txt");

        while (enterAnotherRecord != "Q" && enterAnotherRecord != "q") {
            cout << "Press \"N\" to create a new student record or press \"Q\" to quit." << "\n" << "\n";

            cin >> enterAnotherRecord;

            closeOrNewRecordMenu(enterAnotherRecord);

            string firstName, lastName, seniorPracticum, campus, course1, course2, course3;
            double studentNumber;

            newStudentRecord(studentNumber, firstName, lastName, campus, course1, course2, course3, seniorPracticum, writeToRecordsFile);   
        } 

    writeToRecordsFile.close();

    }
4

1 に答える 1

2

ストリームはコピーできません。コピーできる場合でも、ここではコピーできません。代わりに参照を渡します。newStudentRecord署名を次のように変更します。

void newStudentRecord(double studentNumber, string firstName, string lastName, string campus, string course1, string course2, string course3, string seniorPracticum, ofstream& writeToRecordsFile);

そうは言っても、初期値を気にせず、出力パラメーターとして使用しないのに、なぜこれらすべての引数を渡すのですか？署名を次のように簡略化します。

void newStudentRecord(ofstream& writeToRecordsFile);

そして、他の引数を。内のローカル変数として宣言しますnewStudentRecord。

余談ですが、campusChoice初期化する前に読んでいると、未定義の動作が発生します。

于 2012-09-25T21:54:42.147 に答える