单个继承C ++和头文件 [英] Single Inheritance C++ and header files

问题描述

我获得了一个

 预期的类名'{'token 
  
 
 
 saltwaterfish.h头文件
：
 
 
 
  #ifndef SALTWATERFISH_H 
 #define SALTWATERFISH_H 
 
 
 class saltwaterfish：public fish 
 {
 public：
 saltwaterfish（）; 
 float GetUnitPrice（）; 
 float GetWeight（）; 
}; 
 
 #endif // SALTWATERFISH_H 
  
这是正确的定义方式头文件
 
 
 
saltwaterfish是鱼的子类？
 
 
 
 cpp is 
  #includefish.h
 #includesaltwaterfish.h
  
 fish.cpp类别：
  #includefish.h
 #include< iostream> 
 
 #includefreshwaterfish.h
 #includesaltwaterfish.h
 
 using namespace std; 
 
 fish :: fish（）
 {
}; 
 
 float fish :: CalculatePrice（）
 {
 return GetUnitPrice（）* GetWeight（）; 
} 
 
 float fish :: GetUnitPrice（）
 {
 return 1.0; 
} 
 
 float fish :: GetWeight（）
 {
 return 1.0; 
} 
  
 
 
解决方案
包括 fish.h  saltwaterfish.h中的头文件
  // saltwaterfish.h 
 #includefish.h
 #ifndef SALTWATERFISH_H 
 #define SALTWATERFISH_H 
 
 
 class saltwaterfish：公共鱼
 {
 public： 
 saltwaterfish（）; 
 float GetUnitPrice（）; 
 float GetWeight（）; 
}; 
 #endif // SALTWATERFISH_H 
  
编译器没有看到Fish是一个类，因此错误。
 
I'm getting an 
expected class-name before '{' token
in the following code

the saltwaterfish.h header file:
#ifndef SALTWATERFISH_H
#define SALTWATERFISH_H


class saltwaterfish: public fish
{
public:
    saltwaterfish();
    float GetUnitPrice();
    float GetWeight();
};

#endif // SALTWATERFISH_H
Is this the correct way to define the header file for

"saltwaterfish is a subclass of fish" ?

the only thing I have in saltwaterfish.cpp is
#include "fish.h"
#include "saltwaterfish.h"
the fish.cpp class:
#include "fish.h"
#include <iostream>

#include "freshwaterfish.h"
#include "saltwaterfish.h"

using namespace std;

fish::fish()
{
};

float fish::CalculatePrice()
{
    return GetUnitPrice()*GetWeight();
}

float fish::GetUnitPrice()
{
    return 1.0;
}

float fish::GetWeight()
{
    return 1.0;
}

解决方案
Include the fish.h header file in saltwaterfish.h
//saltwaterfish.h
#include"fish.h"
#ifndef SALTWATERFISH_H
#define SALTWATERFISH_H


class saltwaterfish: public fish
{
public:
    saltwaterfish();
    float GetUnitPrice();
    float GetWeight();
};
#endif // SALTWATERFISH_H
The compiler does not see that Fish is a class, hence the error.

                        
这篇关于单个继承C ++和头文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！