錯誤：我的每個函數和變量'沒有在這個範圍內聲明（代碼;; blocks，C++）

我是新來的C++，我寫了我的第一個'真正的'程序（一個簡單的四操作計算器）。當我編譯它時，我得到了12個編譯器錯誤。我能夠解決一些（丟失分號等），但其中7人拒絕離開。錯誤和我的代碼在這裏：錯誤：我的每個函數和變量'沒有在這個範圍內聲明（代碼;; blocks，C++）

的錯誤：

15 error: 'cout' was not declared in this scope 
    15 error: 'endl' was not declared in this scope 
    21 error: 'GetNumber' was not declared in this scope 
    24 error: 'GetOperator' was not declared in this scope 
    29 error: 'nAnswer' was not declared in this scope 
    33 error: 'AskContinue' was not declared in this scope 
    35 error: 'bContinue' was not declared in this scope

Main.cpp的

//Four-operation calculator 
    //© Olli Utriainen 2013 

    #include <iostream> 
    //Header with functions GetNumber(), GetOperator() and AskContinue() 
    #include "calculator.h" 

    using namespace std; 

    int main() 
    { 
     //Main loop's condition 
     bool bContinue = false; 

     cout << "Welcome to Olli's calculator!" << endl << endl; 

     //Main loop 
     do 
     { 
      cout << "Give first number" << endl; 
      int nNumber1 = GetNumber(); 

      cout << "Give operator (+,-,*,/)" << endl; 
      char cOperator = GetOperator(); 

      cout << "Give second number" << endl; 
      int nNumber2 = GetNumber(); 

      nAnswer = nNumber1 + nNumber2; 

      cout << nNumber1 << " " << cOperator << " " << 
      nNumber2 << " = " << nAnswer << endl; 

      bContinue = AskContinue(); 

     } while (bcontinue); 

     return 0; 
    }

Headers.h

//Headers for the calculator 
    //© Olli Utriainen 2013 

    #ifndef CALCULATOR_H_INCLUDED 
    #define CALCULATOR_H_INCLUDED 

    //Function for inputting numbers 
    int GetNumber() 

    //Function for inputting a mathematical operator (+,-,*,/) 
    char GetOperator() 

    //Function for asking Continue Yes/No 
    bool AskContinue() 

    #endif // CALCULATOR_H_INCLUDED

Functions.cpp

//Functions for the calculator 
    //© Olli Utriainen 2013 

    #include <iostream> 

    using namespace std; 

    //Function for inputting numbers 
    int GetNumber() 
    { 
     int nNumber 

     cin >> nNumber; 

     return nNumber 
    } 

    //Function for inputting a mathematical operator (+,-,*,/) 
    int GetOperator() 
    { 
     char cOperator 
     bool bValidOperator = false; 

     //Do-while loop for checking if given operator 
     //is valid (+,-,*,/). If invalid, bValidOperator 
     //is changed to false ->loop will break and the 
     //given operator is returned 
     do 
     { 
      cin >> cOperator; 

      if (cOperator == '+' || '-' || '*' || '/') 
       { 
        bValidOperator = true; 
       } 
      else 
       { 
        bValidOperator = false; 
        cout << "Invalid operator" << endl; 
       } 


     } while (!bValidOperator) 

     return cOperator; 

    } 

    //Function for asking Continue Yes/No 
    bool AskContinue() 
    { 
     cout << "New calculation? Y/N" << endl; 

     bool bContinue = false; 
     if (cin >> 'Y' || 'y') 
      { 
       bContinue = true; 
      } 
     if (cin >> 'N' || 'n') 
      { 
       bContinue = false; 
      } 
     return bcontinue; 
    }

來源

2013-04-12 Olli Trolli Utriainen

您應該添加大量的';' – RiaD

AskContinue（）也被破壞 – RiaD

在學習C++時，編寫一小部分程序，確保編譯和運行正確，這是一個非常好的做法，然後重複。這裏的總體問題是，您繼續向不正確的代碼添加不正確的代碼。 –

標題中函數聲明的分號？哦，實際上有很多分號不齊。確保在需要時插入它們，然後重試。

來源

2013-04-12 16:39:26 Zaphod

大量的錯字; 缺少分號的分號;

在calculator.cpp，你應該＃包括「calculator.h」

在布爾AskContinue

（）它應該是：

{ 
cout << "New calculation? Y/N" << endl; 
bool bContinue = false; 
char choice; 
cin >> choice; 
if ((choice == 'Y')||(choice == 'y')) 
{ 
    bContinue = true; 
} 
    if ((choice == 'N')||(choice == 'n')) 
{ 
    bContinue = false; 
} 
    return bContinue; 
}

這些是我可以現在才發現。

來源

2013-04-12 19:10:29 Jiang

錯誤：我的每個函數和變量'沒有在這個範圍內聲明（代碼;; blocks，C++）

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