编写一个程序，输出学生已有的学号姓名成绩等数据并计算总人数和平均成绩

#include<iostream>

#include<string>

using namespace std;

class student{

public:

student(stringname1,float score1,string id1)

{name=name1;

score=score1;

id=id1;

++count;

sum=sum+score;

ave=sum/count;

}

voidshow()

{cout<<"学生姓名为："<<name<<endl;

cout<<"学生成绩为："<<score<<endl;

cout<<"学生学号为："<<id<<endl;

}

voidshow_ave_count()

{

cout<<"学生人数为："<<count<<endl;

cout<<"总成绩为："<<sum<<endl;

cout<<"平均成绩为："<<ave<<endl;

}

private:

stringname;

floatscore;

stringid;

staticint count;

staticfloat sum;

staticfloat ave;

};

int student::count=0;

float student::sum=0.0;

float student::ave=0.0;

int main()

{

studentstu1("fish",74.5,"24");

stu1.show();

stu1.show_ave_count();

cout<<"------我是分隔线君----------"<<endl;

studentstu2("liu",75,"15");

stu2.show();

stu2.show_ave_count();

return0;

}