9-9.cpp

能理解C++中运算符重载的需要性

#include <iostream.h>

int array[6][4]={{60,80,90,75},
{75,85,65,77},
{80,88,90,98},
{89,100,78,81},
{62,68,69,75},
{85,85,77,91}};

int& level(int grade[],int size,int& tA,int& tB);

void main()
{
	int typeA=0,typeB=0;
	int student=6;
	int gradesize=4;

	for(int i=0;i<student;i++)
		level(array[i],gradesize,typeA,typeB)++;

	cout<<"number of type A is "<<typeA<<endl;
	cout<<"number of type B is "<<typeB<<endl;
}
int& level(int grade[],int size,int& tA,int& tB)
{
	int sum=0;
	for(int i=0;i<size;i++)
		sum+=grade[i];
	sum/=size;
	if(sum>=80)
		return tA;
	else
		return tB;
}