xt3-3.cpp

清华大学谭浩强编写的C++程序设计的课本中的例子和课后习题的解答！

//11
#include<iostream>
using namespace std;
int main()
{
	float score;
	int grade;
	cout<<"Enter score of a student:\n";
	cin>>score;
	if(score>100||score<0)
		cout<<"You have a wrong number!\n";
	grade=score/10;
	switch(grade)
	case 10:
	case 9:cout<<"A\n";break;
	case 8:cout<<"B\n";break;
	case 7:cout<<"C\n";break;
	case 6:cout<<"D\n";break;
	case 5:
	case 4:
	case 3:
	case 2:
	case 1:
	case 0:cout<<"E\n";break;
	default:;
	return 0;
}