我正在使用Microsoft Visual Studios。
我正在尝试模仿我在Java中使用的过程，但我很难过。
我希望能够将一个对象的名称从一个类传递给一个函数作为它的参数。然后让函数评估传递的对象内的方法的值。
该程序适用于模拟旧式口香糖分配机。
编辑＃2：
好的，经历并重新编辑了代码。现在我收到了一条巨大的错误信息，但它仅用于一部分......
代码：
//Vintage Gum Vending Machine (A4)
#include <iostream>
#include <math.h>
using namespace std;
//input select
char input;
//gum stock
class Gum {
public:
Gum(string Name, int Stock) {
Name = name;
Stock = stock;
};
int stock;
string name;
};
Gum Beemans ("Beemans",10);
Gum Dentyne ("Dentyne", 10);
Gum Chiclets ("Chiclets", 10);
Gum Carefree ("Carefree", 10);
//Main Welcome Menu
void welcomeMenu();
//coin queue of deposited quarters
float Queue = 0.00;
//coin deposit quarter drop
void dropQuarter();
//Tab pulled function
void pulltab(Gum& gum);
//Money in the Machine
float Vault = 0.00;
//Empty deposit queue into vault
void resetQueue();
//restock machine
void restock();
int main()
{
welcomeMenu();
do
{
//take menu choice
cin >> input;
switch (input)
{
case 's' : cout << "Stock Status: " <<endl
<< "1: Beemans: " << Beemans.stock <<endl
<< "2: Dentyne: " << Dentyne.stock <<endl
<< "3: Chiclets: "<< Chiclets.stock <<endl
<< "4: Carefree: "<< Carefree.stock <<endl
<< "There is $" << Vault << " in the machine" <<endl;
break;
case 'd' : cout << "You drop in a quarter \n Clink " <<endl;
dropQuarter();
break;
case '1' : cout << "You reach for the 1st tab and" <<endl;
pulltab(Beemans);
break;
case '2' : cout << "You reach for the 2nd tab and" <<endl;
pulltab(Dentyne);
break;
case '3' : cout << "You reach for the 3rd tab and" <<endl;
pulltab(Chiclets);
break;
case '4' : cout << "You reach for the 4th tab and" <<endl;
pulltab(Carefree);
break;
case 'r' : cout << "You call the store clerk to restock the machine " <<endl;
break;
case 'q' : cout << "quiting program " <<endl;
break;
default : cout << "Please select a choice from the menu" <<endl;
welcomeMenu();
cout << "Please select a choice from the menu" <<endl;
break;
}
} while (input != 'q');
return 0;
};
void welcomeMenu()
{
cout << "s - view stock status " <<endl;
cout << "d - drop in a quarter " <<endl;
cout << "1 - pull 1st tab " <<endl;
cout << "2 - pull 2nd tab " <<endl;
cout << "3 - pull 3rd tab " <<endl;
cout << "4 - pull 4th tab " <<endl;
cout << "r - restock the machine " <<endl;
cout << "q - quit " <<endl;
cout << "(make your selection then press enter)"<<endl;
};
void dropQuarter(){
Queue += 0.25;
};
void pulltab(Gum& gum){
if(gum.stock >=1 && Queue>=0.75){
cout<< "pull the tab out." << endl
<< "The machine dispenses a pack of " << gum.name << "." <<endl
<< "After taking the pack of gum, you push the tab back in." <<endl;
gum.stock -= 1;
resetQueue();
}
else if(gum.stock==0 && Queue>=0.75){
cout<< "pull the tab out." <<endl
<< "But no " << gum.name << "comes out of the slot..." <<endl
<< "(Hint: did you check to see if the gum was in stock before depositing your money in this simulated 1960s gum machine?)" <<endl;
resetQueue();
}else if(Queue<0.75) {
cout << "pull on the tab, but it doesn\'t budge..."<<endl
<< "(Hint: Gum costs 75 ¢ ... have you dropped in at least 3 quarters?)" <<endl;
}
};
void resetQueue(){
Vault += Queue;
Queue = 0.00;
};
错误（抱歉它太大了）：
1>------ Build started: Project: Assignment 4, Configuration: Debug Win32 ------
1> Assignment 4.cpp
1>c:\users\mark\desktop\academic\cs\assignment4\assignment4\assignment 4.cpp(146): error C2679: binary '<<' : no operator found which takes a right-hand operand of type 'std::string' (or there is no acceptable conversion)
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(695): could be 'std::basic_ostream<_Elem,_Traits> &std::operator <<<char,std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,const char *)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(742): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<char,std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,char)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(780): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,const char *)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(827): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,char)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(953): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,const signed char *)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(960): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,signed char)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(967): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,const unsigned char *)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(974): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,unsigned char)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(984): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<char,std::char_traits<char>,std::string>(std::basic_ostream<_Elem,_Traits> &&,const _Ty &)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>,
1> _Ty=std::string
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(1101): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<char,std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,const std::error_code &)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(201): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::basic_ostream<_Elem,_Traits> &(__cdecl *)(std::basic_ostream<_Elem,_Traits> &))'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(207): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::basic_ios<_Elem,_Traits> &(__cdecl *)(std::basic_ios<_Elem,_Traits> &))'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(214): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::ios_base &(__cdecl *)(std::ios_base &))'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(221): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::_Bool)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(241): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(short)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(275): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(unsigned short)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(295): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(int)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(320): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(unsigned int)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(340): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(long)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(360): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(unsigned long)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(381): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(__int64)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(401): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(unsigned __int64)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(422): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(float)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(442): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(double)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(462): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(long double)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(482): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(const void *)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(502): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::basic_streambuf<_Elem,_Traits> *)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> while trying to match the argument list '(std::basic_ostream<_Elem,_Traits>, std::string)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1>c:\users\mark\desktop\academic\cs\assignment4\assignment4\assignment 4.cpp(153): error C2679: binary '<<' : no operator found which takes a right-hand operand of type 'std::string' (or there is no acceptable conversion)
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(695): could be 'std::basic_ostream<_Elem,_Traits> &std::operator <<<char,std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,const char *)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(742): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<char,std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,char)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(780): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,const char *)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(827): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,char)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(953): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,const signed char *)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(960): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,signed char)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(967): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,const unsigned char *)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(974): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,unsigned char)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(984): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<char,std::char_traits<char>,std::string>(std::basic_ostream<_Elem,_Traits> &&,const _Ty &)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>,
1> _Ty=std::string
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(1101): or 'std::basic_ostream<_Elem,_Traits> &std::operator <<<char,std::char_traits<char>>(std::basic_ostream<_Elem,_Traits> &,const std::error_code &)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(201): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::basic_ostream<_Elem,_Traits> &(__cdecl *)(std::basic_ostream<_Elem,_Traits> &))'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(207): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::basic_ios<_Elem,_Traits> &(__cdecl *)(std::basic_ios<_Elem,_Traits> &))'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(214): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::ios_base &(__cdecl *)(std::ios_base &))'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(221): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::_Bool)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(241): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(short)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(275): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(unsigned short)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(295): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(int)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(320): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(unsigned int)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(340): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(long)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(360): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(unsigned long)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(381): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(__int64)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(401): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(unsigned __int64)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(422): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(float)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(442): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(double)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(462): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(long double)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(482): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(const void *)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\ostream(502): or 'std::basic_ostream<_Elem,_Traits> &std::basic_ostream<_Elem,_Traits>::operator <<(std::basic_streambuf<_Elem,_Traits> *)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
1> while trying to match the argument list '(std::basic_ostream<_Elem,_Traits>, std::string)'
1> with
1> [
1> _Elem=char,
1> _Traits=std::char_traits<char>
1> ]
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
答案 0 :(得分：0)
首先，pulltab接受一个指向该对象的指针，并且您不一致地调用它。 Beemans和其他Gum指针应该传递给没有*或＆amp;的函数。像这样称呼它，你也有内存泄漏。在C ++中，您需要删除使用new创建的对象。如果我是你，我不会打扰新关键字。就这样做，
现在，如果你接受我的建议，' - ＆gt;'应该改为'。'用于调用函数。
// Tab pulled function - fixed prototype to use pass by reference
// Do the same in the implementation
void pulltab(Gum& theGum);
// create objects like this. You can leave it global or do it in the body of main
Gum Beemans("Beemans",10);
// call it like this
pulltab(Beemans);
// Invoke functions and access attributes like this
if(gum.stock >= 1 && Queue >= 0.75){ // body of block }
这是基础知识。从Java到C ++处理指针一开始看起来很奇怪，所以尽量避免使用它。尽可能使用引用，智能指针和容器。
答案 1 :(得分：0)
您应该收到此错误：
错误：函数'void pulltab（）'
的参数太多
您需要像这样声明原型：
//Tab pulled function
void pulltab(Gum *gum);
现在，你应该有这个错误：
错误：无法将参数'1'的'Gum'转换为'Gum *'为'void pulltab（Gum *）'
由于你声明了一个指向Gum的指针：Gum *Beemans = new Gum("Beemans",10);，你需要传递这样的参数：pulltab(Beemans);。对其他调用执行相同的操作（不使用&）。
之后，您将收到以下错误：
错误：'operator＆lt;＆lt;'不匹配（操作数类型为'std :: basic_ostream'和''） ＆LT;＆LT; “机器分配一包”＆lt;＆lt; gum-＆gt; getName＆lt;＆lt; “” ＆LT;＆LT; ENDL
你忘记了括号。你应该像这样调用你的类成员函数：gum->getName()
这应该对我有所帮助。