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分享error C2677: binary '==' : no global operator 有关字符串的比较问题，球解答！
if(book[i].getname==name) 这行报错
error C2677: binary '==' : no global operator defined which takes type 'class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >' (or there
is no acceptable conversion)
error C2677: binary '==' : no global operator defined which takes type 'class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >' (or there
is no acceptable conversion)
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asuka__wei 2014-04-29
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版主好快的速度啊 十分感谢 
starytx 2014-04-29
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getname后边要带 () ,那是一个方法
starytx 2014-04-29
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双等号两边的分别是什么类型的对象？
asuka__wei 2014-04-29
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#include <iostream>
#include <iomanip>
#include <string>
using namespace std;
class Reader
{
private:
string Id;
string Password;
string Name;
string Level;
int Cap;
public:
int borbook[15];
string getname()
{
return Name;
}
string getid()
{
return Id;
}
string getpassword()
{
return Password;
}
string getlevel()
{
return Level;
}
int getcap()
{
return Cap;
}
void setReader(string id, string password, string name, string level, int cap)
{
Id=id;
Password=password;
Name=name;
Level=level;
Cap=cap;
}
void borrowbook(int bookid)//借书操作
{
for(int i=0;i<Cap;i++)
{
if (borbook[i]==0)
{
borbook[i]=bookid;
break;
}
}
}
int retbook(int bookid)//还书操作
{
for(int i=0;i<Cap;i++)
{
if(borbook[i]==bookid)
{
borbook[i]=0;
return 1;
}
}
return 0;
}
Reader SearchReader(string id, string password)
{
cout<<"输入卡号："<<endl;
cin>>id;
cout<<endl;
cout<<"输入密码："<<endl;
cin>>password;
cout<<endl;
if (Id==id&&Password==password)
{
cout<<"姓名为："<<Name<<endl;
cout<<"借书等级为："<<Level<<endl;
cout<<"借书容量为："<<Cap<<endl;
cout << setw(5) << Id <<setw(10) << Name<<"借书编号：["; //setw( n ) 设域宽为n个字符
for(int i=0;i<Cap;i++)
if(borbook[i]!=0)
cout << borbook[i] << "|";
cout << "]"<<endl;
}
else
cout<<"卡号或密码错位"<<endl;
}
};
class Book
{
public:
string Id;
string Name;
string Author;
string SearchId;
int OnShelf; // 1:未借 2:已借
string getname()
{
return Name;
}
string getsearchid()
{
return SearchId;
}
string getauthor()
{
return Author;
}
void setBook(string id, string name, string author, string searchid)
{
Id=id;
Name=name;
Author=author;
SearchId=searchid;
OnShelf=1;
}
int borrowbook() //借书操作
{
if (OnShelf==1)
{
OnShelf=0;
return 1;
}
return 0;
}
void retbook() //还书操作
{
OnShelf=1;
}
void disp() //输出图书
{
cout << setw(6) << Id << setw(18) << Name << setw(10)
<<(OnShelf==1? "在架":"已借") <<endl;
}
};
void main()
{
//数据
Reader reader[3];
reader[0].setReader("001","123","麦中凡","一",15);
reader[1].setReader("002","2bk","张国锋","二",10);
reader[2].setReader("003","318","杜杰","二",10);
Book book[5];
book[0].setBook("001","高等数学","华罗庚","O13/10318");
book[1].setBook("002","高等数学","华罗庚","O13/10318");
book[2].setBook("003","高等数学","华罗庚","O13/10318");
book[3].setBook("004","高等数学","范颖川","O13/10437");
book[4].setBook("005","C++程序设计语言","Bjarne","TP312/10277");
char choice;
int bookid,readerid;
while(choice!='0')
{ cout <<endl<<endl<<"\t\t\t图书管理系统\n ";
cout <<"1．借书\t2．还书\t3. 书名检索\4. 索书号检索\t5. 借书证信息"<<endl;
cin >> choice;
switch (choice)
{
case '1':
{
cout <<"借书\n读者编号:";
cin >>readerid;
cout <<"图书编号：";
cin >>bookid;
for(int i=0;i<3;i++)
{
if(i==readerid)
{
reader[i].borrowbook(bookid);
cout<<"借书成功"<<endl;
break;
}
}
}
break;
case '2':
{
cout<<"还书\n读者编号:";
cin >>readerid;
cout << "图书编号:";
cin >>bookid;
for(int i=0;i<3;i++)
{
if(i==readerid)
{
reader[i].retbook(bookid);
cout<<"还书成功"<<endl;
break;
}
}
}
break;
case '3':
{
string name;
cout<<"输入书本名称；"<<endl;
cin>>name;
cout<<endl;
for(int i=0;i<5;i++)
{
if(book[i].getname==name)这行有错啊
cout<<book[i].getname<<" "<<book[i].getauthor<<" "<<book[i].getsearchid<<endl;
}}
case '4':
{
string searchid;
cout<<"输入索书号；"<<endl;
cin>>searchid;
cout<<endl;
for(int i=0;i<5;i++)
{
if(book[i].getsearchid==searchid)
cout<<book[i].getname<<" "<<book[i].getauthor<<" "<<book[i].getsearchid<<endl;
}}
case '5':
{
int id;
string password;
cout<<"输入卡号："<<endl;
cin>>id;
cout<<endl;
cout<<"输入密码："<<endl;
cin>>password;
cout<<endl;
for(int i=0;i<3;i++)
{
if (reader[i].getid==id&&reader[i].getpassword=password)
{
cout<<"姓名为："<<reader[i].getname<<endl;
cout<<"借书等级为："<<reader[i].getlevel<<endl;
cout<<"借书容量为："<<reader[i].getcap<<endl;
cout << setw(5) << Id <<setw(10) << Name<<"借书编号：["; //setw( n ) 设域宽为n个字符
for(int i=0;i<15;i++)
if(reader[i].borbook[i]!=0)
cout << borbook[i] << "|";
cout << "]"<<endl;
break;
}
else
cout<<"卡号或密码错位"<<endl;
}}
default:cout<<"输入错误，请从新输入：";
}
}
}
这是全部代码
