找不到标识符？ [英] Identifiers not found?

问题描述

我在这个真正简单的程序中不断收到错误，我不知道为什么。帮助！

  //这个程序将计算戏剧从特定电影的收入。 
＃include< iostream> 
＃include< iomanip> 
＃include< cstring> 
 using namespace std; 
 
 int main（）
 {
 const float APRICE = 6.00，
 float CPRICE = 3.00; 
 
 int movieName，
 aSold，
 cSold，
 gRev，
 nRev，
 dFee; 
 
 cout<< 电影标题：; 
 getline（cin，movieName）; 
 cout<< 成人票出售：; 
 cin.ignore（）; 
 cin>> aSold; 
 cout<< 儿童票出售：; 
 cin>> cSold; 
 
 gRev =（aSold * APRICE）+（cSold * CPRICE）; 
 nRev = gRev / 5.0; 
 dFee = gRev  -  nRev; 
 
 cout<<固定<显示点<< setprecision（2）; 
 cout<< Movie title：<< setw（48）< movieName<< endl 
 cout<< 售出的成人票数：< setw（31）<< a<< endl 
 cout<< 售出儿童票数：<<< setw（31）< cSold<< endl 
 cout<< 总收入：< setw（36）< $<< setw（10）< gRev < endl 
 cout<< 分销商费用：< setw（34）< $<< setw（10）< dFee< endl 
 cout<< 净收入：< setw（38）< $<< setw（10）< nRev < endl 
 
 return 0; 
} 
  

这里是我得到的错误：

错误C2062：类型'float'意外
错误C3861：'getline'：未找到标识
错误C2065：'CPRICE' ：undeclared identifier


我已经包含了必要的目录，我不明白为什么这不是加工。

解决方案

对于您的第一个错误，我认为问题出现在这个声明中：

  const float APRICE = 6.00，
 float CPRICE = 3.00; 
  

在C ++中，要在一行中声明多个常量，不要重复类型的名称。相反，只需写

  const float APRICE = 6.00，
 CPRICE = 3.00; 
  

这也应该修复你最后一个错误，我相信是由编译器困惑， CPRICE 是一个常数，因为您的声明有错误。

对于第二个错误，使用 getline ，您需要

  #include< string& 
  

不只是

  #include< cstring> 
  

由于 getline 函数位于< string> （新的C ++字符串头），而不是< cstring> 。

也就是说，我认为你仍然会收到错误，因为 movieName code> int 。尝试将其定义为 std :: string 。您可能还想将其他变量声明为 float s，因为它们存储实数。更一般来说，我建议您根据需要定义变量，而不是在顶部。

希望这有助于！

I keep getting errors in this really simple program and I can't figure out why. Help!

//This program will calculate a theater's revenue from a specific movie.
#include<iostream>
#include<iomanip>
#include<cstring>
using namespace std;

int main ()
{
    const float APRICE = 6.00,
          float CPRICE = 3.00;

    int movieName,
        aSold,
        cSold,
        gRev,
        nRev,
        dFee;

    cout << "Movie title: ";
    getline(cin, movieName);
    cout << "Adult tickets sold: ";
    cin.ignore();
    cin >> aSold;
    cout << "Child tickets sold: ";
    cin >> cSold;

    gRev = (aSold * APRICE) + (cSold * CPRICE);
    nRev = gRev/5.0;
    dFee = gRev - nRev;

    cout << fixed << showpoint << setprecision(2);
    cout << "Movie title:" << setw(48) << movieName << endl;
    cout << "Number of adult tickets sold:" << setw(31) << aSold << endl;
    cout << "Number of child tickets sold:" <<setw(31) << cSold << endl;
    cout << "Gross revenue:" << setw(36) << "$" << setw(10) << gRev << endl;
    cout << "Distributor fee:" << setw(34) << "$" << setw(10) << dFee << endl;
    cout << "Net revenue:" << setw(38) << "$" << setw(10) << nRev << endl;

    return 0;
}

And here are the errors I'm getting:

 error C2062: type 'float' unexpected
 error C3861: 'getline': identifier not found
 error C2065: 'CPRICE' : undeclared identifier

I've included the necessary directories, I can't understand why this isn't working.

解决方案

For your first error, I think that the problem is in this declaration:

 const float APRICE = 6.00,
       float CPRICE = 3.00;

In C++, to declare multiple constants in a line, you don't repeat the name of the type. Instead, just write

 const float APRICE = 6.00,
             CPRICE = 3.00;

This should also fix your last error, which I believe is caused by the compiler getting confused that CPRICE is a constant because of the error in your declaration.

For the second error, to use getline, you need to

#include <string>

not just

#include <cstring>

Since the getline function is in <string> (the new C++ string header) and not <cstring> (the old-style C string header).

That said, I think you'll still get errors from this, because movieName is declared as an int. Try defining it as a std::string instead. You might also want to declare your other variables as floats, since they're storing real numbers. More generally, I would suggest defining your variables as you need them, rather than all up at the top.

Hope this helps!

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