Visual Studio Express 2012中的c++程序不能使用.csv，但可以使用.txt

如果所有读取操作都没有获取任何内容，那么很可能您没有成功打开文件，虽然可能有许多原因，但第一步是检测它。您是否测试文件是否成功打开?你可以这样做:

if (ifstream fin("test.csv")) {
    Team team(fin);
    ⋮
} else {
    std::cerr << "Failed to open test.csvn";
}

既然我在这里，我可以建议代码重组吗?大约80%的编码是维护，所以视觉处理的清晰度和速度应该是你编码风格的关键考虑因素:

getline(fin, temp     , ','); idNumber          = stringToInt   (temp);
getline(fin, temp     , ','); idLetter          = temp[0];
getline(fin, name     , ',');
getline(fin, type     , ',');
getline(fin, temp     , ','); rating            = stringToDouble(temp);
getline(fin, notes    , ',');
getline(fin, temp     , ','); canToss           = stringToBool  (temp);
getline(fin, tossType , ',');
getline(fin, temp     , ','); hasFemales        = stringToBool  (temp);
getline(fin, temp     , ','); femaleNumber      = stringToInt   (temp);
getline(fin, temp     , ','); femaleRating      = stringToDouble(temp);
getline(fin, temp     , ','); hasAuto           = stringToBool  (temp);
getline(fin, autoType , ',');
getline(fin, temp     , ','); autoScore         = stringToInt   (temp);
//Get Drive Info
getline(fin, temp     , ','); driveMotors       = stringToInt   (temp);
getline(fin, temp     , ','); driveRatio        = stringToDouble(temp);
getline(fin, driveType, ',');
//Get hang info
getline(fin, temp     , ','); canHang           = stringToBool  (temp);
getline(fin, hangType , ',');
//Get stash info
getline(fin, temp     , ','); canStash          = stringToBool  (temp);
//Get lift indo
getline(fin, temp     , ','); liftMotors        = stringToInt   (temp);
getline(fin, temp     , ','); liftRatio         = stringToDouble(temp);
getline(fin, liftType , ',');
//Get competition info
getline(fin, temp     , ','); driverSkills      = stringToInt   (temp);
getline(fin, temp     , ','); programmingSkills = stringToInt   (temp);
getline(fin, temp     , ','); ranking           = stringToInt   (temp);
getline(fin, temp     , ','); wins              = stringToInt   (temp);
getline(fin, temp     , ','); ties              = stringToInt   (temp);
getline(fin, temp     , ','); losses            = stringToInt   (temp);

作为一个额外的改进，您可以进一步重构代码以避免如此多的读操作:

Team::Team(ifstream& fin)
{
    string temp;
    getline(fin, temp);
    const char * ctemp = temp.c_str();
    std::vector<char> buf(ctemp, ctemp + temp.count() + 1);
    char * lasts, * s = buf.data();
    auto next = [&]{
        char * result = strtok_r(s, ",", &lasts);
        assert(result); // …or throw
        s = NULL;
        return result;
    };
    idNumber          = stringToInt   (next());
    idLetter          =                next()[0];
    name              =                next();
    type              =                next();
    rating            = stringToDouble(next());
    ⋮
    programmingSkills = stringToInt   (next());
    ⋮
}

作为最后一步，您甚至可能希望使用一个方便的提取器类:

class CsvLine {
public:
    CsvLine(const std::string & line) {
        const char * temp = line.c_str();
        buf_.assign(temp, temp + line.length() + 1));
        s_ = buf_.data();
    }
    CsvLine & operator>>(string & x) { x =                next() ; return *this; }
    CsvLine & operator>>(char   & x) { x =               *next() ; return *this; }
    CsvLine & operator>>(int    & x) { x = stringToInt   (next()); return *this; }
    CsvLine & operator>>(bool   & x) { x = stringToBool  (next()); return *this; }
    CsvLine & operator>>(double & x) { x = stringToDouble(next()); return *this; }
private:
    std::vector<char> buf_;
    char * s_, * lasts_;
    char * next() {
        char * result = strtok_r(s_, ",", &lasts_);
        assert(result); // …or throw
        s_ = NULL;
        return result;
    };
};
Team::Team(ifstream& fin)
{
    string line;
    getline(fin, line);
    CsvLine(line)
        >> idNumber >> idLetter >> name >> type >> rating >> notes
        >> canToss >> tossType
        ⋮
        >> driverSkills >> programmingSkills >> ranking >> wins >> ties >> losses;
}