C++ 创建打印文件

Question

我在分配时遇到了一些麻烦，我需要生成一个由数组中的结构组成的数据库文件。 Currently when the selection is made to print the table no noticeable error occurs, but no file is produced by the code. （如果这很乱，我们深表歉意，该网站还是新手）

这是我当前的代码

原型：

void ordertable_disp( item s[], int size);

void print_ordertable_disp(item s[], int size);

表格功能：

void ordertable_disp(item s[], int size)
{
    int counter = 0;
    int BookOrder = 0;
    int enroll = 0;
    double AllOrders = 0.0;
    double OrderFactor = 0.0;
    double total_value = 0.0;
    double bprice = 0.0;
    string resp = "XXX";

    system("cls");

    cout << endl;
    cout << "                                     COLLEGE BOOK ORDERING SYSTEM" << endl;
    cout << endl;
    cout << "                                             Book Order Table" << endl;
    cout << endl;
    cout << endl;
    cout << setw(40) << "Book Title" << " " << setw(15) << "ISBN" << " " << setw(20) << "Author" << " " << setw(19) << "Expected Enrollment" << " " << setw(17) << "Book Cost (Price)" << " " << setw(9) << "Required" << " " << setw(7) << "Unused" << endl;
    cout << setw(40) << "----------" << " " << setw(15) << "----" << " " << setw(20) << "------" << " " << setw(19) << "-------------------" << " " << setw(17) << "-----------------" << " " << setw(9) << "--------" << " " << setw(7) << "------" << endl;
    for(counter = 0; counter < size; counter++)
    {
       cout << setw(40) << s[counter].BookTitle << " " << setw(15) << s[counter].ISBN << " " << setw(20) << s[counter].Author << " " << setw(19) << s[counter].EXPenroll << " " << setw(17) << s[counter].price << " " << setw(9) << s[counter].reqNreq << " " << setw(7) << s[counter].UsedUnused << endl;




           if((s[counter].reqNreq== "Y") || (s[counter].reqNreq== "y"))
         {
               if((s[counter].UsedUnused== "Y") || (s[counter].UsedUnused== "y"))
               {
                  OrderFactor= 1.0; // Book is new and required
               }
              else
               {
                 OrderFactor= 0.60; // Book is used and required
               }
         }

         else                                                     // Order factor calculation

         {
               if((s[counter].UsedUnused== "Y") || (s[counter].UsedUnused== "y"))
               {
                   OrderFactor= 0.35; // Book is new and not required
               }
               else
               {
                    OrderFactor= 0.10; // Book is used and not required
               }
         }

        enroll = atoi(s[counter].EXPenroll.data());
        BookOrder= OrderFactor * enroll;
        bprice = atof(s[counter].price.data());



        total_value = total_value +(total_value = bprice * BookOrder);



    } cout << " Total Order Value: " << total_value << endl;

    cout << " Would You Like To Print This Table(Y/N): "; getline(cin, resp);
    if(toupper(resp.at(0))=='Y')
       void print_ordertable_disp(item s[], int size);


    system("cls");
}

打印功能：

void print_ordertable_disp(item s[], int size)
{
   ofstream ofile;
   ofile.open("Sample2.prn");



   int counter = 0;
    int BookOrder = 0;
    int enroll = 0;
    double AllOrders = 0.0;
    double OrderFactor = 0.0;
    double total_value = 0.0;
    double bprice = 0.0;

    system("cls");

    ofile << endl;
    ofile << "                                    COLLEGE BOOK ORDERING SYSTEM" << endl;
    ofile << endl;
    ofile << "                                             Book Order Table" << endl;
    ofile << endl;
    ofile << endl;
    ofile << setw(40) << "Book Title" << " " << setw(15) << "ISBN" << " " << setw(20) << "Author" << " " << setw(19) << "Expected Enrollment" << " " << setw(17) << "Book Cost (Price)" << " " << setw(9) << "Required" << " " << setw(7) << "Unused" << endl;
    ofile << setw(40) << "----------" << " " << setw(15) << "----" << " " << setw(20) << "------" << " " << setw(19) << "-------------------" << " " << setw(17) << "-----------------" << " " << setw(9) << "--------" << " " << setw(7) << "------" << endl;
    for(counter = 0; counter < size; counter++)
    {
       ofile << setw(40) << s[counter].BookTitle << " " << setw(15) << s[counter].ISBN << " " << setw(20) << s[counter].Author << " " << setw(19) << s[counter].EXPenroll << " " << setw(17) << s[counter].price << " " << setw(9) << s[counter].reqNreq << " " << setw(7) << s[counter].UsedUnused << endl;




           if((s[counter].reqNreq== "Y") || (s[counter].reqNreq== "y"))
         {
               if((s[counter].UsedUnused== "Y") || (s[counter].UsedUnused== "y"))
               {
                  OrderFactor= 1.0; // Book is new and required
               }
              else
               {
                 OrderFactor= 0.60; // Book is used and required
               }
         }

         else                                                     // Order factor calculation

         {
               if((s[counter].UsedUnused== "Y") || (s[counter].UsedUnused== "y"))
               {
                   OrderFactor= 0.35; // Book is new and not required
               }
               else
               {
                    OrderFactor= 0.10; // Book is used and not required
               }
         }

        enroll = atoi(s[counter].EXPenroll.data());
        BookOrder= OrderFactor * enroll;
        bprice = atof(s[counter].price.data());



        total_value = total_value +(total_value = bprice * BookOrder);



    } ofile << " Total Order Value: " << total_value << endl;

    ofile.close();

}

Answer 1

在这段代码中：

    cout << " Would You Like To Print This Table(Y/N): "; getline(cin, resp);
    if(toupper(resp.at(0))=='Y')
       void print_ordertable_disp(item s[], int size);

你似乎是在重新声明函数签名而不是调用函数。

这应该看起来像：

    cout << " Would You Like To Print This Table(Y/N): "; getline(cin, resp);
    if(toupper(resp.at(0))=='Y')
       print_ordertable_disp(s, size);

注意我已经删除了关键字

void

并传递了

s

和

size

而不是重新定义它们。

我认为这很可能是您的问题开始的地方。