我刚刚开始使用C ++编程，如果这是一个可怕的noob错误，请原谅我，但它正在努力。
我有多个正确编程的.cpp文件，编译后没有错误，都有自己的.h文件。
出于某种原因，当我尝试编译一个名为＆＃34; flyingUnit.cpp＆＃34;我得到了数以百计的错误：
DECLARE @table TABLE( MinVal INT,MaxVal INT)
INSERT INTO @table (MinVal,MaxVal)
VALUES (0,10),(10,20),(20,30),(30,40),(40,50)
WITH cte_1
as
(SELECT
Nodes.Caption, Max(CPULoad.MaxLoad) as CPUMax,
AVG(CPULoad.AvgLoad) as CPUAvg,
Round(Max(CPULoad.MaxMemoryUsed / CPULoad.TotalMemory * 100),2) as MemMax,
Round(AVG(CPULoad.AvgPercentMemoryUsed),2) as MEMAvg
FROM
Nodes INNER JOIN
CPULoad ON Nodes.NodeID = CPULoad.NodeID
WHERE
Datetime >= DATEADD(MONTH,datediff(MONTH,0,getdate())-1,0) AND
Datetime < DATEADD(MONTH,datediff(MONTH,0,getdate()),0)
GROUP BY Nodes.Caption)
SELECT *, ISNULL('>= '+CAST( t.MinVal as VARCHAR(50))+' < '+CAST( t.MaxVal as VARCHAR(50)),'') CPUMaxInterval
, ISNULL('>= '+CAST( t1.MinVal as VARCHAR(50))+' < '+CAST( t1.MaxVal as VARCHAR(50)),'') CPUAvgInterval
, ISNULL('>= '+CAST( t2.MinVal as VARCHAR(50))+' < '+CAST( t2.MaxVal as VARCHAR(50)),'') MemMaxInterval
, ISNULL('>= '+CAST( t3.MinVal as VARCHAR(50))+' < '+CAST( t3.MaxVal as VARCHAR(50)),'') MEMAvgInterval
FROM cte_1 ct
LEFT JOIN @table t on ct.CPUMax >= t.MinVal and ct.CPUMax <t.MaxVal
LEFT JOIN @table t1 on ct.CPUAvg >= t.MinVal and ct.CPUAvg <t.MaxVal
LEFT JOIN @table t2 on ct.MemMax >= t.MinVal and ct.MemMax <t.MaxVal
LEFT JOIN @table t3 on ct.MEMAvg >= t.MinVal and ct.MEMAvg <t.MaxVal
我完全不知道为什么会发生这种情况，所有在课堂上使用的东西都找不到，完全傻眼，当它似乎与所有其他课程完美搭配时。为什么我会收到这些错误？
flyingUnit.cpp: In constructor ‘FlyingUnit::FlyingUnit(const char*, const char*, double, double,
bool, const char*, const char*, int, const char*)’:
flyingUnit.cpp:26:38: error: class ‘FlyingUnit’ does not have any field named ‘length’
const char* weyr ) : length(length), wingspan(wingspan), age(age)
^
#ifndef FLYING_UNIT_H
#define FLYING_UNIT_H
#include "rider.h"
#include "dragon.h"
#include "fall.h"
const int MAX_FALLS = 20;
class FlyingUnit
{
public:
FlyingUnit( ) = default;
FlyingUnit( const char* dragonName, const char* dragonColour,
double length, double wingspan, bool breatheFire,
const char* riderName, const char* rank, int age,
const char* weyr );
void addFlyingUnit( const char* dragonName, const char* dragonColour,
double length, double wingspan, bool breatheFire,
const char* riderName, const char* rank, int age,
const char* weyr );
void setRank( const char* rank );
void setWeyr( const char* weyr );
int getFallCount( ) const { return fallCount; }
void addFall( const char* location, int day, int month, int year );
friend ostream& operator << (ostream& os, const FlyingUnit& f );
friend istream& operator >> (istream& is, FlyingUnit & f );
friend ofstream& operator << (ofstream& os, const FlyingUnit& f );
friend ifstream& operator >> (ifstream& is, FlyingUnit& f );
const char* getRiderName( ) const;
const char* getDragonName( ) const;
private:
Rider rider;
Dragon dragon;
Fall falls[ MAX_FALLS ];
int fallCount = 0;
};
#endif
我将提供另一个类和.h文件我已经制作并且工作正常：
Rider.cpp
#include "flyingUnit.h"
#include <iostream>
#include <cctype>
#include <string.h>
int main()
{
return 0;
}
FlyingUnit::FlyingUnit( const char* dragonName, const char* dragonColour,
double length, double wingspan, bool breatheFire,
const char* riderName, const char* rank, int age,
const char* weyr ) : length(length), wingspan(wingspan), age(age)
{
strcpy(this->dragonName, dragonName);
strcpy(this->dragonColour, dragonColour);
this->breatheFire = breatheFire;
strcpy(this->riderName, riderName);
strcpy(this->rank, rank);
strcpy(this->weyr, weyr);
}
ostream& operator << (ostream& os, const FlyingUnit& f)
{
os << "Dragon Name: " << f.dragonName
<< "Dragon Colour: " << f.dragonColour
<< "Length: " << f.length
<< "Wingspan: " << f.wingspan
<< "Breathes Fire: " << f.breatheFire
<< "Rider Name: " << f.riderName
<< "Rank: " << f.rank
<< "Age: " << f.age
<< "Weyr: " << f.weyr << endl;
return os;
}
istream& operator >> (istream& is, FlyingUnit & f)
{
char temp[500];
cout << "Enter Dragon Name: ";
is.getline(temp, 500);
strcpy(f.dragonName, temp);
cout << "Enter Dragon Colour: ";
is.getline(temp, 500);
strcpy(f.dragonColour);
cout << "Length: ";
is >> f.length;
is.ignore(100000, "\n");
cout << "Wingspan: ";
is >> f.wingspan;
is.ignore(100000, "\n");
//cout << "Breathes Fire: ";
// is.getline(temp, 500);
cout << "Enter Rider Name: ";
is.getline(temp, 500);
strcpy(f.riderName, temp);
cout << "Rank: ";
is >> f.rank;
is.ignore(100000, "\n");
cout << "Age: ";
is >> f.age;
is.ignore(100000, "\n");
cout << "Weyr: ";
is.getline(temp, 500);
strcpy(f.weyr, temp);
return is;
}
ofstream& operator << (ofstream& os, const FlyingUnit& f )
{
os << f.dragonName << endl
<< f.dragonColour << endl
<< f.length << endl
<< f.wingspan << endl
<< f.breatheFire << endl
<< f.riderName << endl
<< f.rank << endl
<< f.age << endl
<< f.weyr << endl;
return os;
}
ifstream& operator >> ( ifstream& is, FlyingUnit& f )
{
char temp[500];
is.getline(temp, 500);
strcpy(f.dragonName, temp);
is.getline(temp, 500);
strcpy(f.dragonColour);
is >> f.length;
is.ignore(100000, "\n");
is >> f.wingspan;
is.ignore(100000, "\n");
//cout << "Breathes Fire: ";
// is.getline(temp, 500);
is.getline(temp, 500);
strcpy(f.riderName, temp);
is >> f.rank;
is.ignore(100000, "\n");
is >> f.age;
is.ignore(100000, "\n");
is.getline(temp, 500);
strcpy(f.weyr, temp);
return is;
}
Rider.h
#include "rider.h"
int main()
{
return 0;
}
Rider::Rider( const char* name, int age, const char* rank,
const char* weyr ) : age( age )
{
this->name = new char[ strlen(name) + 1 ];
strcpy( this->name, name );
this->rank = new char[ strlen( rank ) + 1 ];
strcpy( this->rank, rank );
this->weyr = new char[ strlen( weyr ) + 1 ];
strcpy( this->weyr, weyr );
}
ostream& operator << ( ostream& os, const Rider& r)
{
os << "Rider name: " << r.name
<< " Age: " << r.age
<< " Rank: " << r.rank
<< " Weyr: " << r.weyr << endl;
return os;
}
istream& operator >> ( istream& is, Rider& r )
{
char temp[ 500 ];
cout << "Enter Rider name >> ";
is.getline( temp, 500 );
r.name = new char[strlen( temp ) + 1 ];
strcpy( r.name, temp );
cout << "Enter Rider age >> ";
is >> r.age;
// clean up the newline left after the int read
// as we are going to read text next.
is.ignore( 100000, '\n' );
cout << "Enter Rider rank >> " ;
is.getline( temp, 500 );
r.rank = new char[ strlen( temp ) + 1];
strcpy( r.rank, temp );
cout << "Enter Rider weyr >> " ;
is.getline( temp, 500 );
r.weyr = new char[ strlen( temp ) +1];
strcpy( r.weyr, temp );
return is;
}
ofstream& operator << ( ofstream& os, const Rider& r )
{
os << r.name << endl
<< r.age << endl
<< r.rank << endl
<< r.weyr << endl;
return os;
}
ifstream& operator >> ( ifstream& is, Rider & r )
{
char temp[ 500 ];
is.getline( temp, 500 );
r.name = new char[ strlen( temp ) + 1 ];
strcpy( r.name, temp );
is >> r.age;
is.ignore( 100000, '\n' );
is.getline(temp, 500 );
r.rank = new char[ strlen( temp ) + 1];
strcpy( r.rank, temp );
is.getline(temp, 500 );
r.weyr = new char[ strlen( temp ) + 1 ];
strcpy( r.weyr, temp );
return is;
}
答案 0 :(得分：1)
您在班级FlyingUnit中缺少成员变量“double length”
请注意在你的构造函数中
FlyingUnit::FlyingUnit( const char* dragonName, const char* dragonColour,
double length, double wingspan, bool breatheFire,
const char* riderName, const char* rank, int age,
const char* weyr ) : length(length), wingspan(wingspan), age(age)
您尝试初始化不存在的变量;长度，翼展和年龄...尝试在标题中声明那些..