函数重载：

#include<iostream>

using namespace std;

struct complex{

double real;

double imaginary;

};

int add(int,int);

double add(double,double);

complex add(complex,complex);

int main()

{

int a1=2,b1=3;

double a2=2.0,b2=3.0;

struct complex num1={2,3},num2={3,4};

cout<<add(a1,b1)<<endl;

cout<<add(a2,b2)<<endl;

complex n=add(num1,num2);

cout<< n.real<<"+"<<n.imaginary<<"i"<<endl;

return 0;

}

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 m;

m.real=a.real+b.real;

m.imaginary=a.imaginary+b.imaginary;

return m;

}

快速排序：

#include<iostream>

using namespace std;

void quicksort(int a[], int low, int high)

{

if(low>=high){return;}

int num1=low;

int num2=high;

int sample=a[num1];

while(num1<num2)

{

while(num1<num2&&a[num2]>=sample)

--num2;

a[num1]=a[num2];

while(num1<num2&&a[num1]<=sample)

++num1;

a[num2]=a[num1];

a[num1]=sample;

quicksort(a,low,num1-1);

quicksort(a,num1+1,high);

}

}

int main()

{

int i;

int a[]={4,20,15,14,19,7,8};

cout<<"before:";

for(i=0;i<7;i++)

cout<<a[i]<<" ";

cout<<endl;

quicksort(a,0,6);

cout<<"after:";

for(i=0;i<7;i++)

cout<<a[i]<<" ";

cout<<endl;

return 0;

}

简单类对象：

#include<iostream>

#include<string>

using namespace std;

class user

{

public:

void setinfo(string name1,string password1="111111",string email1=" ");

void changepassword();

void printinfo();

private:

string name;

string password;

string email;

};

void user::setinfo(string name1,string password1,string email1)

{

name=name1;

password=password1;

email=email1;

}

void user::changepassword()

{

int i=0;

string mima;

while(1)

{

cout<<"enter the old password:";

cin>>mima;

if(mima==password)

{

cout<<"enter the new password:";

cin>>password;

break;

}

if(mima!=password)

{

i++;

cout<<"the password is wrong,please resume load!"<<endl;

if(i==3)

{

cout<<"please try after a short while!";

break;

}

}

}

}

void user::printinfo()

{

cout<<"name:"<<name<<endl;

cout<<"password:"<<password<<endl;

cout<<"email:"<<email<<endl;

}

int main()

{

cout<<"please enter the first information"<<endl;

user user1;

user1.setinfo("Leonard");

user1.changepassword();

user1.printinfo();

cout<<"please enter the second information"<<endl;

user user2;

user2.setinfo("yfwg","173779","yfwg@bkymail.com");

user2.printinfo();

return 0;

}

实验总结：

1、对于快速排序的算法依旧很生疏，这里的代码借助了百度百科。

2、对于类对象的代码依旧没有形成充足的认识，这次写类对象的代码参考了很多，自己的能力实在不足。要加强这方面练习。

3、对于结构体这一块依旧很不熟练，在c语言的时候就没有学的很扎实，以后还要多练习