我的程序很简单。一类银行账户。每个账户都有一个余额和一个权力。每个账户都有相同的利率。编译时遇到了错误。怎么了?提前致谢。未定义的参考
2 #include <iostream>
3 #include <string>
4 using namespace std;
5 class bank
6 {
7 private:
8 double balance;
9 string owner;
10 static double InterestRate;
11 public:
12 static void AccountInfo(const bank& ac)
13 {
14 cout << "name: " << ac.owner << endl << "balance: " << ac.balance;
15 }
16 static void SetAccount(bank& ac)
17 {
18 cout << "enter a name: " << flush;
19 cin >> ac.owner;
20 cout << "enter a balance: " << flush;
21 cin >> ac.balance;
22 }
23 static void SetRate(const double& n)
24 {
25 InterestRate = n;
26 }
27 static void Balance(bank& ac)
28 {
29 ac.balance += ac.balance * InterestRate;
30 }
31 };
32 int main()
33 {
34 bank NewAccount;
35 bank::SetAccount(NewAccount);
36 bank::SetRate(0.15);
37 bank::Balance(NewAccount);
38 bank::AccountInfo(NewAccount);
39 return 0;
40 }
,输出是:
/tmp/ccUh8Sd9.o: In function `bank::SetRate(double const&)':
e1237.cpp:(.text._ZN4bank7SetRateERKd[bank::SetRate(double const&)]+0x12): undefined reference to `bank::InterestRate'
/tmp/ccUh8Sd9.o: In function `bank::Balance(bank&)':
e1237.cpp:(.text._ZN4bank7BalanceERS_[bank::Balance(bank&)]+0x1c): undefined reference to `bank::InterestRate'
collect2: ld returned 1 exit status
为什么所有函数都是静态的,并且采用类型bank的隐式第一个参数? – hochl
无论您的设计错误是什么,都很奇怪。 – stnr
+1对于一个完整的程序,实际上证明你有错误。下次请不要在其中输入行号。 –