我同学让我做一个商店

于是：

#include<bits/stdc++.h>
using namespace std;
class Product {
public:
    string name;
    double price;
    int stock;

    Product(string n, double p, int s) : name(n), price(p), stock(s) {}
};
void showProducts(const vector<Product>& products) {
    cout << "系统：可购买商品列表：" << endl;
    for (int i = 0; i < products.size(); ++i) {
        cout << i + 1 << ". " << products[i].name << " - 价格: $" << products[i].price << " - 库存: " << products[i].stock << endl;
    }
}
void purchaseProducts(vector<Product>& products) {
    int choice;
    int quantity;

    showProducts(products);
    cout << "系统：请输入想要购买的商品编号（输入0退出购买）：";
    cin >> choice;

    while (choice > 0 && choice <= products.size()) {
        Product& product = products[choice - 1];

        cout << "系统：请输入购买数量：";
        cin >> quantity;

        if (quantity > product.stock) {
            cout << "系统：库存不足，无法购买该数量。" << endl;
        } else {
            product.stock -= quantity;
            cout << "系统：您已购买 " << quantity << " 个 " << product.name << "，总价: $" << product.price * quantity << endl;
        }

        cout << "系统：是否继续购买？（1: 是, 0: 否）";
        cin >> choice;
    }
}
int main(){
	char a;
	bool havesentence=0;
	vector<Product> products = {
        Product("switch", 2000, 100),
        Product("卡带", 210, 150),
        Product("5090显卡", 1290, 200),
		Product("高配电脑",15000,90),
		Product("Silk Song",1000,1),
		Product("马悦的电脑",1000,1),
		Product("马悦的U盘",60,1),
		Product("苹果",10,1000),
		Product("香蕉",10,1000),
		Product("橘子",10,1000),  
    };
	string sentence1="空洞骑士";
	string sentence2="丝之歌";
	string sentence3="丝之鸽";
	string sentence4="樱桃";
	cout<<"店主：欢迎来到我的超市！O(∩_∩)O"<<endl;
	while(1){
		cout<<"系统：聊天按a,买东西按e,退出按b。（温馨提示，店主是斯莱）"<<endl; 
		cin>>a;
		cin.ignore();
		if(a=='a'){
			cout<<"你说:"; 
			string yousay;
			getline(cin,yousay);
			size_t found1 = yousay.find(sentence1);
			size_t found2 = yousay.find(sentence2);
			size_t found3 = yousay.find(sentence3);
			size_t found4 = yousay.find(sentence4);
			if (found1 != string::npos) {
       			havesentence=1;
    		}else if (found2 != string::npos) {
       			havesentence=1;
    		}else if (found3 != string::npos) {
       			havesentence=1;
    		}else if (found4 != string::npos) {
       			havesentence=1;
    		}
			if(havesentence==1){
				cout<<"店主：我恨樱桃，我要给他吃这个！！！！"<<endl;
				cout<<"       ()"<<endl;
				cout<<"      (__)"<<endl;
				cout<<"     (____)"<<endl;
				cout<<"    (______)"<<endl;
				cout<<"   (________)"<<endl;
				cout<<"  (__________)"<<endl;
				cout<<" (____________)"<<endl;
				cout<<"(______________)"<<endl;
				cout<<"店主:***********************"<<endl;
			}else{
				cout<<"店主:哦~哦~哦~"<<endl; 
			} 
		}else  if(a=='e'){
			purchaseProducts(products);
		}else  if(a=='b'){
			cout<<"你：我走了！"<<endl; 
			cout<<"店主：再见\(￣︶￣*\ )"<<endl;
		}else{
			cout<<"店主：？？？"<<endl;
		}
	} 
	return 0;
}//<<fixed<<setprecision(2)
// <<"店主："<<;"系统："

智慧的结晶

哪位dalao给我点建议？？