C++_系列自学课程_第_12_课_结构体

  1 #include <iostream>
  2 #include <string>
  3
  4 using namespace std;
  5
  6 struct CDAccount
  7 {
  8     double balance; //余额
  9     double rate;    //利息
 10     int       term;    //存期
 11 };
 12
 13 struct Date
 14 {
 15     int year;
 16     int month;
 17     int day;
 18 };
 19
 20 struct Person
 21 {
 22     string name;
 23     Date   birthday;
 24     CDAccount account;
 25
 26 };
 27
 28 //****************************************
 29 void get_data(CDAccount& account);
 30 double caculate_balance(CDAccount account);
 31 Person get_person_data(void);
 32 void display_person(Person* person);
 33
 34
 35
 36 //***************************************
 37 //process entry
 38 int main(int argc,char* argv[]) try
 39 {
 40 //*********************
 41 //演示结构体的一般用法
 42     CDAccount marry;
 43
 44     //获取数据
 45     get_data(marry);
 46
 47     //计算利息 结构体成员赋值
 48     marry.balance = caculate_balance(marry);
 49
 50     //输出信息
 51     cout<<"marry的账户余额为:"<<marry.balance<<endl;
 52
 53     CDAccount bob;
 54
 55     //结构体整体赋值
 56     bob = marry;
 57
 58     cout<<"bob的账户余额为:"<<bob.balance<<endl ;
 59
 60     //结构体初始化
 61     CDAccount lee = {3000,0.12,3};
 62
 63     //visual c++ 不支持下面的初始化方式, g++支持，属于实现的扩展，本身不是C++的一部分功能
 64     /*CDAccount jack = {
 65                         .balance = 4000;
 66                         .rate = 0.5;
 67                         .term = 10;
 68                      }*/
 69
 70 //***************************
 71 //演示嵌套结构体的用法
 72     Person dudo;
 73
 74     //输入个人信息， 函数返回结构体
 75     dudo = get_person_data();
 76
 77     display_person(&dudo);
 78
 79
 80     char ch;
 81     cin>>ch;
 82     return 0;
 83 }
 84 catch(...)
 85 {
 86     cout<<"捕捉到异常"<<endl;
 87 }
 88
 89
 90 //获取数据  函数传递结构引用
 91 void get_data(CDAccount& account)
 92 {
 93     cout<<"请输入本金、利率和存期(存期以月份计算，最大为12个月):";
 94     cin>>account.balance;
 95     cin>>account.rate ;
 96     cin>>account.term ;
 97 }
 98
 99
100 //计算余额  函数传递结构体
101 double caculate_balance(CDAccount account)
102 {
103     double balance;
104
105     balance = account.balance + account.balance * account.rate * account.term;
106
107     return balance;
108 }
109
110 //获取个人信息
111 Person get_person_data(void)
112 {
113     Person person;
114     cout<<"请输入账户名称,生日(年、月、日):";
115     cin>>person.name >>person.birthday.year >>person.birthday.month>>person.birthday.day ;
116
117     cout<<"请输入"<<person.name <<"的信息,本金、利息和存期(存期最大12个月):";
118     cin>>person.account.balance >>person.account.rate >>person.account.term ;
119
120     return person;
121 }
122
123
124 //显示信息， 演示结构体指针变量的使用
125 void display_person(Person* person)
126 {
127     cout<<"名字是:"<<person->name<<endl;
128     cout<<"生日是:"<<person->birthday.year<<"-"<<person->birthday.month<<"-"<<person->birthday.day<<endl;
129     cout<<"账户信息:"<<person->account.balance<<"\t"<<person->account.rate<<‘\t‘<<person->account.term<<endl;
130
131 }