C++_系列自学课程_第_12_课_结构体

 #include <iostream>
 #include <string>

 using namespace std;

 struct CDAccount
 {
     double balance; //余额
     double rate;    //利息
     int       term;    //存期
 };

 struct Date
 {
     int year;
     int month;
     int day;
 };

 struct Person
 {
     string name;
     Date   birthday;
     CDAccount account;

 };

 //****************************************
 void get_data(CDAccount& account);
 double caculate_balance(CDAccount account);
 Person get_person_data(void);
 void display_person(Person* person);

 //***************************************
 //process entry
 int main(int argc,char* argv[]) try
 {
 //*********************
 //演示结构体的一般用法
     CDAccount marry;

     //获取数据
     get_data(marry);

     //计算利息 结构体成员赋值
     marry.balance = caculate_balance(marry);

     //输出信息
     cout<<"marry的账户余额为:"<<marry.balance<<endl;

     CDAccount bob;

     //结构体整体赋值
     bob = marry;

     cout<<"bob的账户余额为:"<<bob.balance<<endl ;

     //结构体初始化
     CDAccount lee = {,0.12,};

     //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
     /*CDAccount jack = {
                         .balance = 4000;
                         .rate = 0.5;
                         .term = 10;
                      }*/

 //***************************
 //演示嵌套结构体的用法
     Person dudo;

     //输入个人信息， 函数返回结构体
     dudo = get_person_data();

     display_person(&dudo);

     char ch;
     cin>>ch;
     return ;
 }
 catch(...)
 {
     cout<<"捕捉到异常"<<endl;
 }

 //获取数据  函数传递结构引用
 void get_data(CDAccount& account)
 {
     cout<<"请输入本金、利率和存期(存期以月份计算，最大为12个月):";
     cin>>account.balance;
     cin>>account.rate ;
     cin>>account.term ;
 }

 //计算余额  函数传递结构体
 double caculate_balance(CDAccount account)
 {
     double balance;

     balance = account.balance + account.balance * account.rate * account.term;

     return balance;
 }

 //获取个人信息
 Person get_person_data(void)
 {
     Person person;
     cout<<"请输入账户名称,生日(年、月、日):";
     cin>>person.name >>person.birthday.year >>person.birthday.month>>person.birthday.day ;

     cout<<"请输入"<<person.name <<"的信息,本金、利息和存期(存期最大12个月):";
     cin>>person.account.balance >>person.account.rate >>person.account.term ;

     return person;
 }

 //显示信息， 演示结构体指针变量的使用
 void display_person(Person* person)
 {
     cout<<"名字是:"<<person->name<<endl;
     cout<<"生日是:"<<person->birthday.year<<"-"<<person->birthday.month<<"-"<<person->birthday.day<<endl;
     cout<<"账户信息:"<<person->account.balance<<"\t"<<person->account.rate<<'\t'<<person->account.term<<endl;

 }