实验二

编写重载函数add()，实现对int型，double型，Complex型数据的加法。在main()函数中定义不同类型 数据，调用测试。 

#include<iostream>
using namespace std;

int add(int a,int b)
{
    return a+b;
}
double add(double a,double b)
{
    return a+b;
}
Complex add(Complex a,Complex b)
{
    struct Complex c;
    c.real=a.real+b.real;
    c.imaginary=a.imaginary+b.imaginary;
    return c;
}

struct Complex
{
    double real;
    double imaginary;
}e,f;

int add(int  x, int y);

double add(double x, double y);

Complex add(Complex x,Complex y);

int main()
{
    int a,b;
    double c,d;
    
    cin>>a>>b;
    cout<<add(a,b)<<endl;
    cin>>c>>d;
    cout<<add(c,d)<<endl;
    cin>>e.real>>e.imaginary>>f.real>>f.imaginary; 
    cout<<add(e,f).real<<"+"<<add(e,f).imaginary<<"i"<<endl;
    return 0;
}

 

 

 

编写实现快速排序函数模板，并在main()函数中，定义不同类型数据，调用测试。

#include <iostream>
using namespace std;
template<typename T>
int kspx(T s[], int left, int right)
{
 int i = left + 1, j = right;
 T temp = s[left], t;
 while (i <= j)
 {
  while (s[i] < temp)
   i++;
  while (s[j] > temp)
   j--;
  if (i < j)
  {
   t = s[i];
   s[i] = s[j];
   s[j] = t;
  }
  else i++;
 }
 t = s[j];
 s[j] = s[left];
 s[left] = t;
 return j;
}

template<typename T>
void px(T s[], int left, int right)
{
 if (left > right)
  return;
 int j = kspx(s, left, right);
 px(s, left, j - 1);
 px(s, j + 1, right);
}

int main()
{
 int a[5];
 double b[5];
 int i, j;
 cout << "请输入五个整型数字" << endl;
 for (i = 0;i <= 4;i++)
  cin >> a[i];
 cout << "请输入五个double型数字" << endl;
 for (i = 0;i <= 4;i++)
  cin >> b[i];
 cout << endl;
 px(a, 0, 4);
 px(b, 0, 4);
 for (i = 0;i <= 4;i++)
  cout << a[i] << endl;
 for (i = 0;i <= 4;i++)
  cout << endl << b[i];
 return 0;
}

 

 

 

 

类的定义、实现和使用编程练习 设计并实现一个用户类User，并在主函数中使用和测试这个类。具体要求如下： 每一个用户有用户名(name), 密码(passwd)，联系邮箱(email)三个属性。 支持设置用户信息setInfo()。允许设置信息时密码默认为6个1，联系邮箱默认为空串。 支持打印用户信息printInfo()。打印用户名、密码、联系邮箱。其中，密码以6个*方式显示。 支持修改密码changePasswd(),。在修改密码前，要求先输入旧密码，验证无误后，才允许修改。 如果输入旧密码时，连续三次输入错误，则提示用户稍后再试，暂时退出修改密码程序。 在main()函数中创建User类实例，测试User类的各项操作（设置用户信息，修改密码，打印用户信息）

#include<iostream>
#include<string>
using namespace std;
//user类的声明 
class user{
    public:
        void setinfo(string name ,string password="111111" ,string email="");//带有默认形参值 
        void changepassword();
        void printfinfo();
    private:
        string name;
        string password;
        string email;
};
//user类的实现 
void user::setinfo(string name0, string password0, string email0) {
    name = name0;
    password = password0;
    email = email0;
}
//成员函数changepassword的实现 
void user::changepassword()
{
    string password1;
    int c = 3;
    cout << "please enter the old password firstly,if it is right ,you can change password then" << endl;
    cin >> password1;
    while (password1 != "111111"&&c > 1)
    {
        c--;
        cout << "old password is not corrent,you have " << c << " time(s) to try it again" << endl;
        cin >> password1;
    }
    if (c <= 1)
        cout << "you have no time to try, please try it next day!" << endl;
    else
    {
        cout << "you changed your password successfully! please remember it" << endl;
        password = password1;
    }
}
//成员函数printinfo的实现 
void user::printfinfo()
{
    cout << "name:\t"<< name << endl;
    cout << "password:\t" << "******" << endl;
    cout << "email:\t" << email << endl;
}
//主函数中对user类进行测试 
int main()
{
    cout << "...testing 1..." << endl;
    user user1;
    user1.setinfo("George");
    user1.printfinfo();
    user1.changepassword();
    user1.printfinfo();
    cout << endl;
    cout << "...testing 2..." << endl;
    user user2;
    user2.setinfo("Mary", "520520", "xyzabc@qqcom");
    user2.printfinfo();
    return 0;
}