#include<iostream.h>
int &level(int gread,int &typeA,int &typeB,int &typeC);
void main(){
	int typeA=0,typeB=0,typeC=0;
	int stu=9;
	int a[9]={90,75,83,66,58,40,80,85,71};
	for(int i=0;i<stu;i++)
		level(a[i],typeA,typeB,typeC)++;
	cout<<"A類學(xué)生數(shù)"<<typeA<<endl;
	cout<<"B類學(xué)生數(shù)"<<typeB<<endl;
	cout<<"C類學(xué)生數(shù)"<<typeC<<endl;
}
int &level(int gread,int &typeA,int &typeB,int &typeC){
	if(gread>=80)return typeA;
	else if(gread>=60)return typeB;
	else return typeC;
}