Question

我正在执行一个程序，该程序应该从文本文件中提取行并逐行读取它们。我的程序在第一行工作良好，但是停止并且不读取后三行。这是我到目前为止的代码：

ifstream inputfile;
ofstream outputfile;
inputfile.open("test.txt");
outputfile.open("invoice.txt");

while (!inputfile.eof())

{

    inputfile >> cust_id;
    inputfile >> title;
    inputfile >> author;
    inputfile >> isbn;
    inputfile >> isbn2;
    inputfile >> isbn3;
    inputfile >> isbn4;
    inputfile >> price;
    inputfile >> quanity;
    inputfile >> type;
    inputfile >> genre;


    outputfile << "____________________________________________________________________________________________________________" << endl;
    outputfile << "Invoice" << endl;
    outputfile << " " << endl;
    outputfile << "Customer ID: " << cust_id << endl;
    outputfile << title << "      " << fiction_type << "     " << genre_type << "        " << quanity << "@" << price << "      " << "subtotal: " << subtotal << endl;
    outputfile << " " << endl;
    outputfile << "Total book sales: " << subtotal << endl;
    outputfile << "Tax: " << totaltax << endl;
    outputfile << "Subtotal: " << subtotal_withtax << endl;
    outputfile << "Fee: " << fee << endl;
    outputfile << "Total: " << total_price << endl;

    cout << "something" << endl;
    inputfile.close();
    return 0;
}

我已经删除了部分代码，因为它不是必需的，它只是使用不同的if / elif循环来验证数据。

我尝试读取的文件是：

234 Dog_Strategy Henry_Moreno 3-598-21500-2 12.99 5 N M
6789 Companion_Kicked_Me_Out Lorraine_Johnson 3-598-21599-1 24.99 3 F R
3444 Mime_On_My Journey Kristy_Wahl 3-699-21500-8 6.75 10 N D
4455 Damaged_By_The_Joke Henry_Christopher 3-598-21500-2 12.99 4 N R

当我执行代码时，它可以完美地完成第一行，但不会读取最后三行，因此我无法弄清原因。任何帮助都是极好的。

Answer 1

 ifstream inputfile;
ofstream outputfile;
inputfile.open("test.txt");
outputfile.open("invoice.txt");

while (!inputfile.eof())

{

    inputfile >> cust_id;
    inputfile >> title;
    inputfile >> author;
    inputfile >> isbn;
    inputfile >> isbn2;
    inputfile >> isbn3;
    inputfile >> isbn4;
    inputfile >> price;
    inputfile >> quanity;
    inputfile >> type;
    inputfile >> genre;


    outputfile << "____________________________________________________________________________________________________________" << endl;
    outputfile << "Invoice" << endl;
    outputfile << " " << endl;
    outputfile << "Customer ID: " << cust_id << endl;
    outputfile << title << "      " << fiction_type << "     " << genre_type << "        " << quanity << "@" << price << "      " << "subtotal: " << subtotal << endl;
    outputfile << " " << endl;
    outputfile << "Total book sales: " << subtotal << endl;
    outputfile << "Tax: " << totaltax << endl;
    outputfile << "Subtotal: " << subtotal_withtax << endl;
    outputfile << "Fee: " << fee << endl;
    outputfile << "Total: " << total_price << endl;

    cout << "something" << endl;

}

inputfile.close();
return 0;

您必须关闭文件并在循环后返回，否则程序将在一次迭代后退出。

while（！inputfile.eof（））仅读取第一行？

1 个答案: