Question

我有一个名为BottlingPlant的课程。我创建了以下头文件：

#ifndef __BOTTLINGPLANT_H__
#define __BOTTLINGPLANT_H__

#include <iostream>

class BottlingPlant {
public:
BottlingPlant( Printer &prt, NameServer &nameServer, unsigned int numVendingMachines, unsigned int maxShippedPerFlavour, unsigned int maxStockPerFlavour, unsigned int timeBetweenShipments );
void getShipment( unsigned int cargo[ ] );
void action();  
};

#endif

以下.cc文件：

#include <iostream>
#include "PRNG.h"
#include "bottlingplant.h"

BottlingPlant::BottlingPlant( Printer &prt, NameServer &nameServer, unsigned int numVendingMachines, unsigned int maxShippedPerFlavour, unsigned int maxStockPerFlavour, unsigned int timeBetweenShipments ) {


}

void BottlingPlant::getShipment( unsigned int cargo[ ] ) {

}

void BottlingPlant::action() {

}

当我尝试编译.cc时，它会在.cc和.h中给出错误：

BottlingPlant::BottlingPlant( Printer &prt, NameServer &nameServer, unsigned int numVendingMachines, unsigned int maxShippedPerFlavour, unsigned int maxStockPerFlavour, unsigned int timeBetweenShipments )

说)令牌之前有预期的&。这对我没有任何意义，因为没有开放(。我只是不确定为什么它会给出这个错误。 Printer和NameServer只是项目的一部分，但是..我是否还需要包含头文件？

非常感谢任何帮助！

Answer 1

您需要包含您正在使用的任何类的头文件，甚至包括同一项目中的类。编译器将每个单独的源文件作为单独的translation unit进行处理，如果定义它的标头未包含在该转换单元中，则不会知道该类是否存在。

Answer 2

您的.h文件应包含具有Printer和NameServer类定义的标头。例如，如果它们在MyHeader.h中，则显示的以下示例应该修复这些错误。

#ifndef __BOTTLINGPLANT_H__
#define __BOTTLINGPLANT_H__

#include <iostream>
#include "MyHeader.h"

class BottlingPlant {
public:
BottlingPlant( Printer &prt, NameServer &nameServer, unsigned int numVendingMachines, unsigned int maxShippedPerFlavour, unsigned int maxStockPerFlavour, unsigned int timeBetweenShipments );
void getShipment( unsigned int cargo[ ] );
void action();  
};

#endif

编译文件时出现C ++错误

2 个答案: