Question

有人也可以告诉我，我试图做的动作是否正确。我是c ++的新手，我认为它是正确的，但我有疑问

#include<iostream>
#include<fstream>
#include<cstdlib>
#include<iomanip>
using namespace std;
int main()
{
 ifstream in_stream; // reads itemlist.txt
 ofstream out_stream1; // writes in items.txt
    ifstream in_stream2; // reads pricelist.txt
 ofstream out_stream3;// writes in plist.txt
 ifstream in_stream4;// read recipt.txt
 ofstream out_stream5;// write display.txt
 float price='  ',curr_total=0.0;
 int wrong=0;
 int itemnum='  ';
 char next;
 in_stream.open("ITEMLIST.txt", ios::in); // list of avaliable items
   if( in_stream.fail() )// check to see if itemlist.txt is open
   {
       wrong++;
      cout << " the error occured here0, you have " << wrong++ << " errors"  << endl;
      cout << "Error opening the file\n" << endl;
      exit(1);
      }
   else{
    cout << " System ran correctly " << endl;

 out_stream1.open("listWititems.txt", ios::out); // list of avaliable items
   if(out_stream1.fail() )// check to see if itemlist.txt is open
   {
       wrong++;
      cout << " the error occured here1, you have " << wrong++ << " errors"  << endl;
      cout << "Error opening the file\n";
      exit(1);
      }
   else{
    cout << " System ran correctly " << endl;
   }

 in_stream2.open("PRICELIST.txt", ios::in);    
  if( in_stream2.fail() )
   {
       wrong++;
      cout << " the error occured here2, you have " << wrong++ << " errors"  << endl;
      cout << "Error opening the file\n";
      exit (1);
   }
   else{
    cout << " System ran correctly " << endl;
   }

 out_stream3.open("listWitdollars.txt", ios::out);    
  if(out_stream3.fail() )
   {
      wrong++;
      cout << " the error occured here3, you have " << wrong++ << " errors"  << endl;
      cout << "Error opening the file\n";
      exit (1);
   }
   else{
    cout << " System ran correctly " << endl;
   }

 in_stream4.open("display.txt", ios::in);
  if( in_stream4.fail() )
   {
       wrong++;
      cout << " the error occured here4, you have " << wrong++ << " errors"  << endl;
      cout << "Error opening the file\n";
      exit (1);
   }
   else{
    cout << " System ran correctly " << endl;
   }


 out_stream5.open("showitems.txt", ios::out);
   if( out_stream5.fail() )
   {
       wrong++;
      cout << " the error occured here5, you have " << wrong++ << " errors"  << endl;
      cout << "Error opening the file\n";
      exit (1);
   }
   else{
    cout << " System ran correctly " << endl;
   }
    in_stream.close(); // closing files.
  out_stream1.close();
  in_stream2.close();
  out_stream3.close();
  in_stream4.close();
  out_stream5.close();
  system("pause");
 in_stream.setf(ios::fixed);
 while(in_stream.eof())
 {
  in_stream >> itemnum;
  cin.clear();
  cin >> next;
 }
 out_stream1.setf(ios::fixed);
 while (out_stream1.eof())
 {
  out_stream1 << itemnum;
  cin.clear();
  cin >> next;
 }
 in_stream2.setf(ios::fixed);
 in_stream2.setf(ios::showpoint);
 in_stream2.precision(2);
    while((price== (price*1.00)) && (itemnum == (itemnum*1)))
   {
    while (in_stream2 >> itemnum >> price) // gets itemnum and price
    {
     while (in_stream2.eof())  // reads file to end of file
     {
     in_stream2 >> itemnum;
    in_stream2 >> price;
    price++;
    curr_total= price++;
    in_stream2 >> curr_total;
    cin.clear();  // allows more reading
    cin >> next;
    }

   }
  }
 out_stream3.setf(ios::fixed);
 out_stream3.setf(ios::showpoint);
 out_stream3.precision(2);
 while((price== (price*1.00)) && (itemnum == (itemnum*1)))
  {
   while (out_stream3 << itemnum << price)
    {
     while (out_stream3.eof())  // reads file to end of file
     {
     out_stream3 << itemnum;
     out_stream3 << price;
     price++;
     curr_total= price++;
     out_stream3 << curr_total;
     cin.clear();  // allows more reading
     cin >> next;
     }
    return itemnum, price;
   }
  }
 in_stream4.setf(ios::fixed);
 in_stream4.setf(ios::showpoint);
 in_stream4.precision(2);
 while ( in_stream4.eof())
 {
  in_stream4 >> itemnum >> price >> curr_total;
  cin.clear();
  cin >> next;
 }
 out_stream5.setf(ios::fixed);
 out_stream5.setf(ios::showpoint);
 out_stream5.precision(2);
 out_stream5 <<setw(5)<< " itemnum " <<setw(5)<<" price "<<setw(5)<<" curr_total " <<endl; // sends items and prices to receipt.txt 
 out_stream5 << setw(5) <<  itemnum << setw(5) <<price << setw(5)<< curr_total; // sends items and prices to receipt.txt 
 out_stream5 << " You have a total of " << wrong++ << " errors " << endl; 


}

Answer 1

在第一个其他区块我猜测你错过了'}'。

为了避免将来出现此类问题，请修改缩进（或让AStyle或类似程序为您修复）并使用突出显示语法的编辑器（尤其是大括号之间的代码块）。

Answer 2

在你的其他人之后，你的第一个if else语句缺少}。我的建议是：摆脱{因为它只是一行代码。

Answer 3

最终你可能会错过“}”，另外一件重要的事情就是尝试使用文件的完整地址。我遇到了同样的问题，不同的编译器会以不同的方式读取地址。所以尽量清楚文件的地址。

致命错误C1075：在左括号之前找到的文件结尾以及读取和写入文件不起作用

3 个答案: