include<bits/stdc++.h>

using namespace std; int main(){

char fhjs;
int fhb=0;
int yyy=10;
int t=50;
int a=rand()%100;
int b=rand()%100;
int ans=0;
int c;
int jf=0;
char pop;
cout<<"按o进入商城，按l进入试炼"<<endl;
cin>>pop;
if(pop=='l'){
	while(t>=0){
	cout<<"第"<<ans<<"题"<<endl;
	cout<<"当前积分:"<<jf<<endl;
	cout<<"复活币:"<<fhb<<endl;
	cout<<"失败机会:"<<yyy<<endl;
	cout<<a<<'+'<<b<<'='; 
	cin>>c;
	if(a+b==c){
		cout<<"蒸蚌！！！"<<endl; 
		ans++;
	}
	else{
		cout<<"这都不会？？？菜就多练！！！！"<<endl;
		ans++;
	}
	if(ans/10==0){
		jf++;
		cout<<"积分加1！";
	}
	t--;
}
}
else if(pop=='o'){
	t=50;
	char j;
	while(t>0){
		cout<<"hi,这里是商城"<<endl ;
		cout<<"1、复活币（20积分）按k购买"<<endl;
		cout<<"按q退出！"<<endl;
		cin>>j;
		if(j=='k'){
			cout<<"购买成功！"<<endl; 
			jf-=20;
			fhb++;
		}
		else if(j=='q'){
			break;
		}
		else{
			cout<<"积分不足！"<<endl;
		}
	}
}
t=50;
while(t>=0){
	cout<<"第"<<ans<<"题"<<endl;
	cout<<"当前积分:"<<jf<<endl;
	cout<<"复活币:"<<fhb<<endl;
	cout<<"失败机会:"<<yyy<<endl;
	cout<<a<<'+'<<b<<'='; 
	cin>>c;
	if(yyy=0){
		cout<<"Game over";
		if(yyy>0){
			cout<<"是否使用复活币？(按wy使用)";
			cin>>fhjs;
			if(fhjs=='wy'){
				cout<<"复活成功！";
				yyy=10;
				continue; 
			}
			else{
				cout<<"你失败了！";
				break;
			}
		}
		else if(yyy==0){
			cout<<"你失败了！";
			break;
		}
	}
	if(a+b==c){
		cout<<"蒸蚌！！！"<<endl; 
		ans++;
	}
	else{
		cout<<"这都不会？？？菜就多练！！！！"<<endl;
		ans++;
		yyy--;
	}
	if(ans/10==0){
		jf++;
		cout<<"积分加1！";
	}
	t--;
}
return 0;

}

1、商店只能开一次 2、只有50次答题机会 3、做错一次失败机会就变成-1了