c++ - 如何将由制表符分隔的文件读入结构

Question

如何将如下格式的文件读入一个结构体？ 这是我到目前为止的代码，我无法让它工作。我可以输入整行，但我如何将数据位分开？？？

New England Patriots    6   2       .750    3-2 3-0 1-0 1   
Buffalo Bills       5   2       .714    4-0 1-2 1-0 1   

ifstream inFile;

string name1;
string conference1;
string division1;
unsigned short wins1;
unsigned short losses1;
float pct1;

int i = 0;
int count = 0;
// this declares the strings we need 
string line = "";
int a = 0;
string temp = "";

inFile.open(filename.c_str());

if (!inFile) {
    cerr << "Unable to open file" << filename;
    exit(1);   // call system to stop
}
if (inFile) {

    while (inFile.good())
    {
        //std::getline(inFile, line, '\t'); this is how you get line skipping tabs 

        std::getline(inFile, line);
        cout << line;
        cout << endl;
        teams[a].raw = line;
        //cout << teams[a].raw;
        //cout << endl;
        //  teams[a].name = line;

        teams[a].position = a + 1;
        a++;
    }
    cout << teams[20].raw;
    cout << endl;
    cout << a - 1;
    cout << endl;
}
inFile.close();

struct NFL {
    string name;
    string conference;
    string division;
    unsigned short wins;
    string win;
    unsigned short losses;
    string lose;
    float pct;
    string per;
    string home;
    string road;

    string raw;
    int position;
};

struct ExpectedChar { char expected; };

// read a character from a stream and check it has the expected value
std::istream& operator>>(std::istream& in, const ExpectedChar& e)
{
    char c;
    if (in >> c)
        if (c != e.expected)  // failed to read expected character
            in.setstate(std::ios::failbit);
    return in;
}

// read a struct pass from a stream
std::istream& operator>>(std::istream& in, NFL& p)
{
    ExpectedChar tab{ '\t' };
    in >> p.name >> tab >> p.serviceTime >> tab >> p.classType;
    return in;
}

Answer 1

使用std::getline()以\n(默认)作为分隔符读取整行，然后使用std::istringstream 解析每一行的值，使用 std::getline() 读取由非空格分隔的字符串数据。

例如:

ifstream inFile(filename.c_str());
if (!inFile) {
    cerr << "Unable to open file" << filename;
    exit(1);   // call system to stop
}

string line;
while (getline(inFile, line))
{
    istringstream iss(line);

    getline(iss, teams[a].name, '\t');

    ...

    iss >> teams[a].wins;
    /* or:
    string temp;
    getline(iss, temp, '\t');
    istringstream(temp) >> teams[a].wins;
    */

    ... and so on  ...
}