c ++ csv逗号分隔的文件条目，混合类型的麻烦

问题描述

测试文件

11111,Smith,Bob,10,9,8,92,89,90
11112,Doe,Jean,7,84,88,89
11113,Hardy,Joe,90,95

信息存储在

struct Student {
    std::string ID;
    std::string lName;
    std::string fName;
    int quiz1;
    int quiz2;
    int quiz3;
    int quiz4;
    int quiz5;
    int quiz6;
    int test1;
    int test2;
    int final;
    float total;
};

问题：添加成绩时，它只会正确读取第一级。 我尝试了许多不同的方法，但这是迄今为止唯一一种甚至部分有效的方法:( 手动设置学生结构时，测试值确实可以正常工作；所以读入的文件是问题

int main() {

    //add a place to store student info
    StudentGrades session;
    string inFile = "classGrades.txt";

    //open input file if possible or display an error message and exit with failure
    ifstream in;
    cout << "opening File: " << inFile << "\n";
    in.open(inFile);
    if (in.is_open()) {
        cout << "File Open: " << inFile << "\n";
        string line;
        while (getline(in,line)) {
            //read in student info from file line by line to a Student object for each line
            Student student;
            std::stringstream stream(line); //record info from file
            getline(stream,student.ID,',');
            getline(stream,student.lName,student.fName,');
            stream >> student.quiz1;
            stream >> student.quiz2;
            stream >> student.quiz3;
            stream >> student.quiz4;
            stream >> student.quiz5;
            stream >> student.quiz6;
            stream >> student.test1;
            stream >> student.test2;
            stream >> student.final;

            session.add(student);
       }
    }
    else
    {
        cout << "File Could not be opened: " << inFile << "\n";
        exit(1);
    }
    //close the input file
    cout << "Closing File: " << inFile << "\n";
    in.close();
    cout << "File Closed: " << inFile << "\n";

    session.printStudentList(cout);

    return 0;
}

文件输出

opening File: classGrades.txt
File Open: classGrades.txt
Closing File: classGrades.txt
File Closed: classGrades.txt
ID    | Last Name  | First Name  |    Q1 |    Q2 |    Q3 |    Q4 |    Q5 |    Q6 |    T1 |    T2 | Final | Total
11113 | Hardy      | Joe         |     9 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |  2.25
11112 | Doe        | Jean        |     8 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     2
11111 | Smith      | Bob         |    10 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |     0 |   2.5

解决方法

您的问题是，与抛出分隔符的 getline 不同，stream >> student.quiz1; 没有，因此当您尝试执行 {{1} }.您需要从流中取出那个逗号。您可以通过使用 , 来“吃掉”角色，或使用命名的 stream >> student.quiz2; 像

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