common.h

二叉排序树的所有功能

//辅助函数
//返回分数对应的分数段
int mark2key(int key){
	if (key<50) return 0;
	else if(key<60) return 1;
	else if(key<66) return 2;
	else if(key<70) return 3;
	else if(key<76) return 4;
	else if(key<80) return 5;
	else if(key<86) return 6;
	else if(key<90) return 7;
	else if(key<96) return 8;
	else if(key<100) return 9;
	else return 10;
}
//辅助函数
//输出分数段对应的字符串
void key2char(int key){
	switch (key)
	{
	case 0:cout<<"E";
		break;
	case 1:cout<<"D";
		break;
	case 2:cout<<"C";
		break;
	case 3:cout<<"C+";
		break;
	case 4:cout<<"B-";
		break;
	case 5:cout<<"B";
		break;
	case 6:cout<<"B+";
		break;
	case 7:cout<<"A";
		break;
	case 8:cout<<"AA";
		break;
	case 9:cout<<"AAA";
		break;
	default:break;
	}
}