#include<bits/stdc++.h>
#include<windows.h>
using namespace std;

string To_Str(int);
string To_English(int);
int To_int(string);
void say();
void say2();
void Input_illegal();
void Loading();
void Egg();
char Create_Formula(int);
//声明函数 

int First_Num,Second_Num,Right_Answer;
int Quantity,Scope,Input_Num;
int Right=0,Wrong=0;
string ass;

string num[30]={"one","two","three","four","five","six","seven","eight","nine","ten"\
				,"eleven","twelve","thirteen","fourteen","fifteen","sixteen","seventeen"\
				,"eighteen","nineteen","twenty","thirty","forty","fifty","sixty","seventy"\
				,"eighty","ninety"};
string To_English(int number)
{
	if (number>=100) return To_Str(number);
	if (number<=20) return num[number-1];
	string out;
	out=out+"-"+num[number%10-1];
	out=num[(number-number%10)/10+17]+out;
	return out;
}

int To_Int(string number)
{ 
	int Int=atoi(number.c_str());
	return Int;
}

string To_Str(int number)
{
	stringstream ss;
	ss<<number;
	string Str=ss.str();
	return Str;
}

inline void say(string s)
{
    for(int i=0;i<s.size();i++)
    {
    	cout<<s[i];
		Sleep(20);
	}
    printf("\n");
    return;
}

inline void say2(string s)
{
    for(int i=0;i<s.size();i++)
    {
		cout<<s[i];
		Sleep(20);
	}
    return;
}

inline void Input_illegal()
{
	say("Your input is illegal!");
	Sleep(400);
	
	say("The system has exited!");
	Sleep(2000);
	return;
}

inline void Egg()
{
	say("Your input is illegal!");
	Sleep(400);
	
	say("The system has not exited!");
	Sleep(2000);
	
	say("Ha,ha!");
	Sleep(400);
	
	say("That's the egg!");
	Sleep(1000);
	
	say("The writer is henry!");
	Sleep(2000);
	return;
}

inline void Loading()
{
	for (int i=1;i<=8;i++)
	{
		system("cls");
		cout<<"Your computing career is over!"<<endl;
		cout<<"Loading.";
		Sleep(20);
		
		system("cls");
		cout<<"Your computing career is over!"<<endl;
		cout<<"Loading..";
		Sleep(20);
		
		system("cls");
		cout<<"Your computing career is over!"<<endl;
		cout<<"Loading...";
		Sleep(20);
	}
	system("cls");
	return;
}

char Create_Formula(int Scope)
{
	char Sign;
ReStart:
	srand(time(0));
	if (Scope>10)
	{
		First_Num=rand()%Scope;
		Second_Num=rand()%Scope;
	}
	else
	{
		Second_Num=rand()%(Scope-1);
		First_Num=rand()%(Scope-Second_Num-1)+Second_Num+1;
	}
	if (First_Num==Second_Num) goto ReStart;
	Sign=(rand()%2==0)?'+':'-';
	Sleep(30);
	
	if (Sign=='+') Right_Answer=First_Num+Second_Num;
	else Right_Answer=First_Num-Second_Num;
	
	return Sign;
}

int main()
{
	say("Hello!");
	Sleep(500);
	say("I am a interesting system of mental arithmetic.");
	Sleep(500);
	say("My name is Little Qi.");
	Sleep(800);
	
	cout<<endl;
	say("Please don't type anything before I ask you.");
	Sleep(1500);
	
	bool Is_Yes;
	if (MessageBox(NULL,TEXT("Are you good at Math?"),TEXT("Remember your choice"),MB_YESNO)==IDYES)
	{
		system("cls");
		say("Are you sure?");
		say("Let me put you to the test!");
		Is_Yes=true;
	}
	else
	{
		system("cls");
		say("Oh!");
		say("Let me help you improve.");
		Is_Yes=false;
	}
	
	if (MessageBox(NULL,TEXT("Can we get started?"),TEXT("Press the button!"),0))
	{
		Sleep(1500);
		system("cls");
	}
	
	say("You can choose the difficulty now!");
	say("Please choose the difficulty according to your own strength!");
	Sleep(1000);
	say("The first difficulty is simple.    (Add and subtract within 10)");
	Sleep(500);
	say("The second difficulty is middle.   (Add and subtract within 100)");
	Sleep(500);
	say("The third difficulty is difficult. (Add and subtract within 1000)");
	Sleep(500);
	say("The forth difficulty is inferno.   (Add and subtract within 10000)");
	Sleep(800);
	say2("Please choose the difficulty:");
	cin>>ass;
	
	if (ass=="simple" or ass=="Simple" or ass=="1" or ass=="first" or ass=="First") Scope=10;
	else if (ass=="middle" or ass=="Middle" or ass=="2" or ass=="second" or ass=="Second") Scope=100;
	else if (ass=="difficult" or ass=="Difficult" or ass=="3" or ass=="third" or ass=="Third") Scope=1000;
	else if (ass=="inferno" or ass=="Inferno" or ass=="4" or ass=="forth" or ass=="Forth") Scope=10000;
	else if (ass=="helloworld!" or ass=="helloworld" or ass=="Hello world!" or ass=="Helloworld!"or ass=="Hello world")
	{
		Egg();
		return 0;
	}
	else
	{
		Input_illegal();
		return 0;
	}
	
	if (Scope==10)
	{
		say("You choose the simple difficulty.");
	} else if (Scope==100)
	{
		say("You choose the middle difficulty.");
	} else if (Scope==1000)
	{
		say("You choose the difficult dificulty.");
	} else if (Scope==10000)
	{
		say("You choose the inferno dificulty.");
	}
	
	Sleep(1900);
	say2("Please tell me how many crossings you need to make:");
	cin>>ass;
	for (int i=0;i<ass.size();i++)
	{
		if (ass[i]<='0'&&ass[i]>'9')
		{
			Input_illegal();
			return 0;
		}
	}
	
	Quantity=To_Int(ass);
	if (Quantity<=0)
	{
		Input_illegal();
		return 0;
	}
	if (Quantity>1) say("You're going to do "+To_English(Quantity)+" channel problems.");
	else say("You're going to do one channel problem.");
	
	Sleep(800);
	say("Let's do the math!");
	Sleep(1800);
	system("cls");
	
	for (int i=1;i<=Quantity;i++)
	{
		char Sign=Create_Formula(Scope);
		cout<<First_Num<<Sign<<Second_Num<<'=';
		cin>>ass;
		
		for (int j=0;j<ass.size();j++)
		{
			if (ass[j]<'0'&&ass[j]>'9')
			{
				Input_illegal();
				return 0;
			}
		}
		
		Input_Num=To_Int(ass);
		if (Input_Num==Right_Answer)
		{
			Right++;
			say("   Your answer is correct!");
		}
		else
		{
			Wrong++;
			say("   Your answer is wrong!");
		}
		
		Sleep(380);
		if (i%5==0)
		{
			system("cls");
		}
	}
	
	Sleep(850);
	system("cls");
	say("Your computing career is over!");
	Loading();
	
	if (Quantity>1) say("You've done "+To_English(Quantity)+" problems.");
	else say("You've done "+To_English(Quantity)+" problem.");
	if (Right>1) say("You've got "+To_English(Right)+" right answers!");
	else say("You've got "+To_English(Right)+" right answer!");
	if (Wrong>1) say("You've got "+To_English(Wrong)+" wrong answers!");
	else say("You've got "+To_English(Wrong)+" wrong answer!");
	//此处 if 语句判断的是英语中的单复数情况 
	
	float score=(100/Quantity)*Right;
	if (score==0) say("You got a zero!");
	else if (score<60) say("Your grades are failing.");
	else if (score>=60 and score<80) say("Your grades are pass.");
	else if (score>=80 and score<90) say("Your grades are good.");
	else if (score>=90) say("Your grades are excellent.");
	
	if (score>=90 and Is_Yes==true) say("You are really good at math!");
	else if (score<60 and Is_Yes==true) say("Your Maths wasn't good, but you said you were good at math.");
	else if (score>=90 and Is_Yes==false) say("Modesty is also a kind of strength!");
	else if (score<60 and Is_Yes==false) say("Honesty is a good quality.");
	
	Sleep(2000);
	return 0;
}

共计312行