程序设计学习（c++）（课堂学习2）

0000000000000000程序设计学习（c++）（课堂学习2）
1.用string对象处理字符串
当处理字符串时优先选择用string对象处理，用法比字符数组更简单且不易出错。

当用字符数组处理时：

#include<iostream>
#include<string.h>
using namespace std;
struct STUDENT
{int StudNo;
char StudName[33];
};
void DisplayStudent(STUDENT *pStud)
{cout<<"Student No :"<<pStud->StudNo<<endl;
cout<<"Student Name :"<<pStud->StudName<<endl;
cout<<"------------"<<endl;
}
int main()
{STUDENT Stud1,Stud2,Stud3;
Stud1.StudNo=1;
strcpy(Stud1.StudName,"zhang san");//字符串的赋值
Stud2.StudNo=2;
strcpy(Stud2.StudName,"Li si");
Stud3.StudNo=3;
strcpy(Stud3.StudName,"Wang wu");
DisplayStudent(&Stud1);
DisplayStudent(&Stud2);
DisplayStudent(&Stud3);
return 0;
}

将上述代码变换一下：

#include<iostream>
#include<string.h>
using namespace std;
struct STUDENT
{int StudNo;
char StudName[33];
void Display()
{cout<<"Student No :"<<StudNo<<endl;
cout<<"Student Name :"<<StudName<<endl;
cout<<"------------"<<endl;
}
};
int main()
{STUDENT Stud1,Stud2,Stud3;
Stud1.StudNo=1;
strcpy(Stud1.StudName,"zhang san");
Stud2.StudNo=2;
strcpy(Stud2.StudName,"Li si");
Stud3.StudNo=3;
strcpy(Stud3.StudName,"Wang wu");
Stud1.Display();
Stud2.Display();
Stud3.Display();
return 0;
}

当成员函数在类的定义以外时，格式如下：

返回值类型类名：：函数名（）
{
语句组
}
例如，将上述代码变换：

#include<iostream>
#include<string>
using namespace std;
class CStudent
{public:
int StudNo;
char StudName[30];
void Display();
};
void CStudent::Display()
{cout<<"Student No :"<<StudNo<<endl;
cout<<"Student Name:"<<StudName<<endl;
cout<<"---------------"<<endl;
}
int main()
{CStudent Stud1,Stud2,Stud3;
Stud1.StudNo=1;
strcpy(Stud1.StudName,"Zhang san");
Stud2.StudNo=2;
strcpy(Stud2.StudName,"Li si");
Stud3.StudNo=3;
strcpy(Stud3.StudName,"Wang wu");
Stud1.Display();
Stud2.Display();
Stud3.Display();
return 0;
}

2.定义string对象
格式：
string 变量名；
以上述代码为例：

#include<iostream>
#include<string>
using namespace std;
class CStudent
{public:
int StudNo;
string StudName;
void Display();
};
void CStudent::Display()
{cout<<"Student No:"<<StudNo<<endl;
cout<<"Student Name:"<<StudName<<endl;
cout<<"------------------"<<endl;
}
int main()
{CStudent Stud[3];
CStudent *pStud;
int i;
Stud[0].StudNo=1;
Stud[0].StudName="Zhang san";
Stud[1].StudNo=2;
Stud[1].StudName="Li si";
Stud[2].StudNo=3;
Stud[2].StudName="Wang wu";
for(i=0;i<3;i++)
{pStud=&Stud[i];
pStud->Display();
}
return 0;
}

3.析构函数

#include<iostream>
using namespace std;
class CComplex
{private:
double real;
double imag;
public:
CComplex();
CComplex(double real,double imag);
CComplex(const CComplex &z);
~CComplex();double GetReal()const;
double Getimag()const;
void Display;
};
CComplex::CComplex()
{cout<<"Constructor CComplex::CComplex()!"<<endl;
real=0.0;
imag=0.0;
}
CComplex::CComplex(double real,double imag)
{cout<<"Constructor CComplex::CComplex(double real,double imag)!"<<endl;
this->real=real;
this->imag=imag;
}
CComplex::CComplex(const CComplex &z)
{cout<<"Copy  constructor CComplex::CComplex(const CComplex &z)!"<<endl;
real=z.real;
imag=z.imag;
}
CComplex::~CComplex()
{cout<<"Destructor CComplex::~CComplex()!"<<endl;
}
double CComplex::GetReal()const
{return real;
}
double CComplex::Getimag()const
{return imag;
}
void CComplex::Display()
{cout<<real<<"+"<<imag<<"i"<<endl;
}
CComplex Globle_z;
void DisplayComplex(const CComplex &z)
{cout<<z.GetReal()<<"+"<<z.Getimag()<<"i"<<endl;
}
int main()
{cout<<"---------------------"<<endl;
CComplex z1;
z1.Display();
cout<<"---------------"<<endl;
CComplex*pz1;
pz1=new CComplex;
pz1->Display();
delete pz1;
cout<<"-------------"<<endl;
CComplex z2(3.0,4.0);
z2.Display();
cout<<"-------------"<<endl;
CComplex *pz2;
pz2=new CComplex(3.0,4.0);
pz2->Display();
delete pzz2;
cout<<"-------------"<<endl;
CComplex z3(6.0,8.0);
DisplayComplex(z3);
cout<<"---------------"<<endl;
CComplex z4(z3);
z4.Display();
cout<<"--------------"<<endl;
return 0;
}

输出员工信息：

#include<iostream>
#include<string>
using namespace std;
class CEmployee
{private:
int ID;
string Name;
string Sex;
int Age;
double Salary;
public:
CEmployee();
~CEmployee();
int GetId();
void SetID(int ID);
string GetName();
void SetName(string Name);
string GetSex();
void SetSex(string Sex);
int GetAge();
void SetAge(int Age);
double GetSalary();
void SetSalary(double Salary);
void Display();
};
CEmployee::CEmployee()
{cout<<"Constructor CEmployee::CEmployee()!"<<endl;
ID=0;
Name="No Name";
Sex="Female";
Age=0;
Salary=0.0;
}
CEmployee::~CEmployee()
{cout<<"Destructor CEmployee::~CEmployee!"<<endl;
}
int CEmployee::GetID()
{return ID;
}
void CEmployee::SetID(int ID)
{if(ID>0)
{this->ID=ID;
}
}
string CEmployee::GetName()
{return Name;
}
void CEmployee::SetName(string Name)
{this->Name=Name;
}
string CEmployee::GetSex()
{return Sex;
}
void CEployee::SetSex(string Sex)
{if((Sex=="Female")||(Sex=="Male"))
{this->Sex=Sex;
}
}
int CEmployee::GetAge()
{return Age;
}
void CEmployee::SetAge(int Age)
{if((Age>=18)&&(Age<=60))
{this->Age=Age;
}
}
double CEmployee::GetSalary()
{return Salary;
}
void CEmployee::SetSalary(double Salary)
{if(Salary>0.0)
{this->Salary=Salary;
}
}
void CEmployee::Display()
{cout<<"-----------------"<<endl;
cout<<"Employee ID:"<<ID<<endl;
cout<<"Name :"<<Name<<endl;
cout<<"Sex  :"<<Sex<<endl;
cout<<"Age  ："<<Age<<endl;
cout<<"Salary :"<<Salary<<endl;
cout<<"======================="<<endl;
}
int main()
{CEmployee Employees[4];
Employees[0].SetID(1);
Employees[0].SetName("zhang shan");
Employee[0].SetSex("Male");
Employee[0].SetAge(25);
Employee[0].SetSalary(5000.0);
Employee[1].SetID(2);
Employee[1].SetName("Li si");
Employee[1].SetSex("Female");
Employee[1].SetAge(25);
Employee[1].SetSalary(5000.0);
Employee[2].SetID(3);
Employee[2].SetName("wang wu");
Employee[2].SetSex("Male");
Employee[2].SetAge(30);
Employee[2].SetSalary(8000.0);
for(int i=0;i<4;i++)
{Employees[i].Display();
}
cout<<"--------------------"<<endl;
for(int j=0;j<4;j++)
{if(Employees[j].GetID()!=0)
{cout<<"Employee   ID:"<<Employees[j].GetID()<<"\t";
cout<<"Name:"<<Employees[j].GetName()<<"\t";
cout<<"Sex:"<<Employees[j].GetSex()<<"\t";
cout<<"Age:"<<Employees[j].GetAge()<<"\t";
cout<<"Salary:"<<Employees[j].GetSalary()<<endl;
}
else
{cout<<"Invalid  Employee Information!"<<endl;
}
cout<<"------------------"<<endl;
}
return 0;
}

程序设计学习（c++）（课堂学习2）相关推荐

小甲鱼c语言课后作业_知识，就是力量——山财“学习小课堂”助你蓄力
编者按少年,你渴望知识的力量吗? 我们有山财最全的学习秘籍, 只待你的耐心翻阅与潜心修炼! 接下来,就让我们一起查收学习干货~ 内容摘要本系列推送分为 [悦览篇][干货篇][招募篇] 三大模块 ...
20175317 《Java程序设计》第一周学习总结
20175317 <Java程序设计>第一周学习总结教材学习内容总结本周学习了Java大致的开发步骤,完成了课件自带的习题. 学习了在windows与Linux系统下不同的编译方法,掌 ...
20155227 2016-2017-2 《Java程序设计》第九周学习总结
20155227 2016-2017-2 <Java程序设计>第九周学习总结教材学习内容总结 JDBC简介 JDBC全名Java DataBase Connectivity,是java联 ...
自主互助四环节之计算机教案,自主互助学习型课堂的实施方案
自主互助学习型课堂的实施方案自主互助学习型课堂以它的高效.自主.学生的自学能力开发吸引了我们每位老师,为了更好地在我校实施自主互助学习型课堂,特制定以下实施方案. 一.预期目标. 通过本学期的&qu ...
20172318 2016-2017-2 《Java程序设计》第一周学习总结
20172318 2016-2017-2 <Java程序设计>第一周学习总结教材学习内容总结在教材中基本明白了计算机系统的运行方式,了解了对于高级语言是使用是掌握好编程的关键,掌握了一 ...
20155303 2016-2017-2 《Java程序设计》第二周学习总结
20155303 2016-2017-2 <Java程序设计>第二周学习总结教材学习内容总结『注意』 "//"为单行批注符: "/*"与&quo ...
20165218 2017-2018-1 《Java程序设计》第四周学习总结
20165218 2017-2018-1 <Java程序设计>第四周学习总结教材学习内容总结第五章子类与继承子类与父类通过关键字extands定义子类 class 子类 exta ...
20155327《Java程序设计》第二周学习总结
<Java程序设计>第二学习总结教材学习内容总结类型 byte(字节) shot(短整型) int(整型) long(长整型) float(浮点型) double(双精度) char( ...
20175208 《Java程序设计》第九周学习总结
20175208 2018-2019-2 <Java程序设计>第九周学习总结一.教材学习内容总结: 第11章 JDBC与MySQL数据库 MySQL数据库管理系统 MySQL数据库管理系 ...

程序设计学习（c++）（课堂学习2）

程序设计学习（c++）（课堂学习2）相关推荐

最新文章

热门文章