Question

我有一个程序分配，以将数据加载到类名册数组。它加载正常，但是当我尝试通过printAll函数打印数组内容时，出现错误：

在Test.exe中的0x00C2F213处引发异常：0xC0000005：访问冲突读取位置0xCCCCCCCC

数据将加载所有五个学生的数据。 printAll函数使用for循环（在for循环内是对虚拟打印函数的调用）来打印每条记录。但是它会将加载的最后一个学生记录（即使我将索引计数器初始化为0）打印到数组，然后崩溃。不知何故，我的索引/指针指向数组中的最后一条记录，而不是第一个。

这是我的代码：

int main() {
string rowText;
int commaPos1 = 0;
int commaPos2 = 2;
//int daysInCourse[3];

string StudentDataArray[5][9];

const string studentData[] =
{ 
    "A1,John,Smith,John1989@gm ail.com,20,30,35,40,NETWORK",                //SECURITY
    "A2,Suzan,Erickson,Erickson_1990@gmailcom,19,50,30,40,NETWORK",         //NETWORK
    "A3,Jack,Napoli,The_lawyer99yahoo.com,19,20,40,33,NETWORK",             //SOFTWARE
    "A4,Erin,Black,Erin.black@comcast.net, 22,50,58,40,NETWORK",            //SECURITY
    "A5,William,Byrd ,wbyrd7@wgu.edu,57,32,11,23,NETWORK",                  //SOFTWARE
};

//Loading Students to a multi-column array prior to loading it into class roster.
cout << "Loading temporary table..." << endl;
int row, rowLength;
int column;
for (row = 0;row < 5;++row) {        //for each row:
    rowText = (studentData[row]); // read the row into variable, get its character length 
    rowLength = rowText.size();   // and set the column position counters to zero
    commaPos1 = 0;
    commaPos2 = 0;
    for (column = 0;column < 9; ++column) {  //for each column: 
        if (column != 8) {   //Column is not the last column (last column needs to be processed differently due to final comma)
            commaPos2 = studentData[row].find(",", commaPos2);
            StudentDataArray[row][column] = studentData[row].substr(commaPos1, commaPos2 - commaPos1);
            ++commaPos2;
            commaPos1 = commaPos2;
        }
        else {
            StudentDataArray[row][column] = studentData[row].substr(commaPos1, rowLength - commaPos1);
        }
    }
}
cout << "Temporary table loaded...";


//load Class Roster from array
Roster classRoster;
Degree DegreeProgramEnum = NETWORKING;
cout << "Loading class Roster..." << endl;
for (row = 0; row < 5; row++) {
    /*if (StudentDataArray[row][8] == "NETWORK") {
        DegreeProgramEnum = NETWORKING;
        //cout << "Student is is the networking degree program." << endl;
    }
    else if (StudentDataArray[row][8] == "SOFTWARE") {
        DegreeProgramEnum = SOFTWARE;
    }
    else if (StudentDataArray[row][8] == "SECURITY") {
        DegreeProgramEnum = SECURITY;
    }
    else {
        cout << "ERROR: Degree Program is not NETWORKING, SOFTWARE OR SECURITY: " << StudentDataArray[row][8];
    }*/

    classRoster.add(StudentDataArray[row][0],         //Student ID
                    StudentDataArray[row][1],         //First Name
                    StudentDataArray[row][2],         //Last Name
                    StudentDataArray[row][3],         //Email
                    stoi(StudentDataArray[row][4]),   //Age
                    stoi(StudentDataArray[row][5]),   //DaysInCourse1
                    stoi(StudentDataArray[row][6]),   //DaysInCourse2
                    stoi(StudentDataArray[row][7]),   //DaysInCourse3
                    DegreeProgramEnum);               //Enumerated degree program:  SECURITY = 0, NETWORK = 1, SOFTWARE = 2
    cout << "loading classRoster Record #: " << StudentDataArray[row][0] << endl;
}
cout << "Class Roster loaded..." << endl;


//print student data array
classRoster.printAll();

这是我的printAll函数：

void Roster::printAll() {
//cout << "C867 Scripting and Programming - Applications" << endl;
//cout << "C++" << endl;
//cout << "William Byrd (ID# 000941206)" << endl;
//cout << endl << endl;
cout << "Printing Class Roster..." << endl;
int e = 0;
int arrayitems = sizeof(classRosterArray) / sizeof(classRosterArray[e]);
cout << "number of array items: " << arrayitems << endl;
for (int i = 0; i < arrayitems; i++) {
    if (classRosterArray[i] != nullptr) { 
        classRosterArray[i]->print();
        cout << "ClassRoster row #:  " << i << endl;
    }
}
cout << "Class Roster Printed..." << '\n' << endl;

这是另一个cpp文件中的print()函数：

void Student::print()
{
    string degree;

    if (getsDegreeProgram() == 0)
        degree = "SECURITY";
    else if (getsDegreeProgram() == 1) 
        degree = "NETWORK";
    else  // getsDegreeProgram() == 2:  SOFTWARE
        degree = "SOFTWARE";

    cout << getSID() << "\t"
        << "First Name: " << getsFName() << "\t"
        << "Last Name: " << getsLName() << "\t"
        << "Email Address: " << getsEmail() << "\t"
        << "Age: " << getsAge() << "\t" << "   "
        << "Days In Course: { " << getsDIC()[0] << ", " << getsDIC()[1] << ", " << getsDIC()[2] << " }\t"
        << "Degree Program: " << degree << endl;
}

这是我的输出：

正在加载临时表...

临时表已加载...

正在加载课程名册...

正在加载classRoster记录＃：A1

正在加载classRoster记录＃：A2

加载classRoster记录＃：A3

加载classRoster记录＃：A4

正在加载classRoster记录＃：A5

类名册已加载...

打印班级名册...

数组项数：5

A5名：William姓：Byrd电子邮件地址：wbyrd7@wgu.edu年龄：57天课程：{32，11，23}学位课程：网络

ClassRoster行＃：0

打印学生花名册数组时出错：“ ...访问冲突读取位置0xCCCCCCCC。”

0 个答案: