#include<iostream.h>
#include"string.h"
class score
{
private:
char name[8],xh[7];
double sx,yw,yy;
public:
score(char n[8],char z[7],double a,double b,double c)
{
strcpy(name,n);
strcpy(xh,z);
sx=a;
yw=b;
yy=c;
}
score()
{
cout<<"请输入姓名:";
cin>>name;
cout<<"请输入学号:";
cin>>xh;
cout<<"请输入数学成绩:";
cin>>sx;
cout<<"请输入语文成绩:";
cin>>yw;
cout<<"请输入英语成绩:";
cin>>yy;
}
void display()
{
cout<<"输出姓名:";
cout<<name<<endl;
cout<<"输出学号:";
cout<<xh<<endl;
cout<<"三科的总分:";
cout<<sx+yw+yy<<endl;
cout<<"输出平均分:";
}
friend double average(score);
};
double average(score x)
{
double pj;
pj=(x.sx+x.yw+x.yy)/3;
return pj;
}
void main()
{
score s;
s.display();
cout<<average(s)<<endl;
}
题目要求:设计学生成绩类SCORE包括学号,姓名,数学,语文,英语和平均成绩私有数据成员,再定义一个计算学生平均成绩的普通函数AVERAGE(),并将该函数定义为SCORE类的友元函数,在主函中定义学生成绩对象,通过构造函数给初平均成绩之外的成员赋值,然后通过调用AVERAGE(),计算平均成绩并赋值输出学生成绩的所有信息!