C++学生信息处理

#include

#include

using namespace std;

template

int getArrayLen(T& array) //使用模板定义一个函数getArrayLen,该函数将返回数组array的长度

{

return (sizeof(array) / sizeof(array[0]));

}

class Student{

public:

char name[20];

int id;

int score;

public:

Student(int i = 0, char* c="", int s= 0)

{

id = i;

strcpy(name,c);

score = s;

}

Student& operator = (const Student& rhs )

{

id = rhs.id;

strcpy(name,rhs.name);

score = rhs.score;

return *this;

}

void gets()

{

cin>>name>>id>>score;

}

void print()

{

cout<<"name: "<<name<<" id: "<<id<<" score: "<<score<<endl;

}

} ;

void rank(int n,Student a[])//排序函数

{

int i, j; Student t;

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

for(j = i + 1; j < n -1 ; j ++)

{

if(a[i].score < a[j].score){t = a[i]; a[i] = a[j] ;a[j] = t;}

}

}

int average(Student a[],int n)//求平均数

{

int sum = 0,average;

for(int i = 0 ; i < n ; i++)

sum+=a[i].score;

average = sum / n;

return average;

}

void input(Student s[],int n)//输入信息的函数

{ 

for(int i = 0 ; i < n ; i++)

   s[i].gets();

}

void output(Student s[],int n)//输出信息的函数

{ 

for(int i = 0 ; i < n ; i++)

      s[i].print();

}

//主函数

int main()

{

Student class1[10];//十个人的信息

cout<<"******************************************"<<endl;

cout<<"please enter name id score:"<<endl;

input(class1,10);

cout<<"name              id             score  :"<<endl;

cout<<"******************************************"<<endl;

output(class1,10);

cout<<"******************************************"<<endl;

cout<<"this class average score is:"<<average(class1,4)<<endl;

cout<<"******************************************"<<endl;

    rank(10,class1);

output(class1,4);//输出前四的信息

return 0;

}