意义不明

#include<bits/stdc++.h>
#include<conio.h>
#include<windows.h>
using namespace std;
int main(){
	system("color 0b");
	srand(time(0));
	cout<<"please press the letter to choose mode"<<endl;
	cout<<"j is for CSP-J s is for CSP-S"<<endl;
	int RP=0;
	if(getch()=='j'){
		int score=0;
		system("cls");
		cout<<"press x to decide your RP!";
		if(getch()=='x'){
			RP=rand()%100+1;
		}
		system("cls");
		cout<<"your RP:"<<RP<<endl;
		cout<<"Now choose the problem's answer!(4 problem)"<<endl;
		cout<<"you can press a,b,c,d(don't ask me why program problems has option ツ(idk too))"<<endl;
		for(int i=1;i<=4;i++){
			system("color 0b");
			cout<<"your score "<<score<<endl;
			cout<<"The "<<i<<" problem!"<<endl;
			int right=rand()%4+1,nggu=rand()%4+1;
			while(nggu==right){
				nggu=rand()%4+1;
			}
			int c=getch()-96;
			if(c==right){
				system("color 0A");
				cout<<"WTF?! U AC ITTTTT!!!!!! GOOD JOBBBBB!!!!";
				Sleep(2000);
				score+=100;
				system("cls");
			}
			else if(c==nggu){
				cout<<"You get "<<RP<<" score! great!";
				Sleep(2000);
				score+=RP;
				system("cls");
			}
			else{
				system("color 04");
				cout<<"Not right answer... redouble your efforts";
				Sleep(2000);
				system("cls");
			}
		}
		if(score<=100){
			system("color 04");
			cout<<"U NEED MORE PRACTICE!!!! DO UR F**KING PROBLEM NOWWWWWWWW!!!! >=(";
		}
		else if(score>=100&&score<=200){
			system("color 09");
			cout<<"u are better than me.... ok,I admit I'm the worsest oier (ToT)";
		}
		else if(score>=200&&score<=399){
			system("color 06");
			cout<<"wow! so good! i think you can try to AK it awa";
		}
		else if(score==400){
			system("color 0A");
			cout<<"wtf?! your score is hard to describe it in words! you AK it! QWQ";
		}
	}
	else if(getch()=='s'){
		int score=0;
		system("cls");
		cout<<"press x to decide your RP!";
		if(getch()=='x'){
			RP=rand()%30+1;
		}
		system("cls");
		cout<<"your RP:"<<RP<<endl;
		cout<<"Now choose the problem's answer!(4 problem)"<<endl;
		cout<<"you can press a,b,c,d,e,f,g,h(don't ask me why program problems has option ツ(idk too))"<<endl;
		for(int i=1;i<=4;i++){
			system("color 0b");
			cout<<"your score "<<score<<endl;
			cout<<"The "<<i<<" problem!"<<endl;
			int right=rand()%8+1,nggu=rand()%8+1;
			while(nggu==right){
				nggu=rand()%8+1;
			}
			int c=getch()-96;
			if(c==right){
				system("color 0A");
				cout<<"WTF?! U AC S PROBLEM?! YOU ARE BEST!!!!";
				Sleep(2000);
				score+=100;
				system("cls");
			}
			else if(c==nggu){
				cout<<"You get "<<RP<<" score! "<<"No full score... but good too!(is s not j!!)";
				Sleep(2000);
				score+=RP;
				system("cls");
			}
			else{
				system("color 04");
				cout<<"Not right answer... is very normal... redouble your efforts";
				Sleep(2000);
				system("cls");
			}
		}
		if(score==0){
			cout<<"emm... you have a lot of brave... you are good too qwq";
		}
		if(score>0&&score<=100){
			system("color 04");
			cout<<"not very high score... but you are very good!(is s!)";
		}
		else if(score>=100&&score<=200){
			system("color 09");
			cout<<"wow! the score in s is very nice! you can try 300 score!";
		}
		else if(score>=200&&score<=399){
			system("color 06");
			cout<<"wtf?! your score is hard to describe it in words! you AK it! QWQ";
		}
		else if(score==400){
			system("color 0A");
			cout<<"I dont wanna say anything... you're a god.....";
		}
	}
	return 0;
}