本帖最後由 tonyh 於 2014-2-15 18:02 編輯
新增 "購物清單" 功能, 使結帳時能不只計算出價錢, 還能列出細目.
參考執行畫面如下:
- #include<iostream>
- #include<cstdlib>
- using namespace std;
- int main()
- {
- string name[7]={"遙控汽車","飛機模型","足球 ","拼圖 ",
- "玩具槍 ","可愛玩偶","籃球 "}; //商品名稱
- int price[7]={450,550,325,200,660,150,380}; //商品單價
- int qty[7]={0,0,0,0,0,0,0}; //購買數量
- int p,q,sum=0; //商品代碼,數量,總金額
- cout<<"☆★☆ 智能玩具店 ☆★☆"<<endl<<endl;
- cout<<"[商品價目表]"<<endl;
- for(int i=0; i<=6; i++)
- {
- cout<<"("<<i+1<<")"<<name[i]<<"\t"<<price[i]<<"元"<<endl;
- }
- cout<<"(8)結帳"<<endl<<endl;
- re:
- cout<<"請輸入商品代碼: ";
- cin>>p;
- if(p>=1 && p<=7)
- {
- cout<<"數量: ";
- cin>>q;
- if(q>0)
- {
- sum+=price[p-1]*q; //sum=sum+price[p-1]*q
- qty[p-1]+=q; //qty[p-1]=qty[p-1]+q
- goto re;
- }else
- {
- cout<<"輸入錯誤!"<<endl;
- goto re;
- }
- }else if(p==8)
- {
- goto checkout;
- }else
- {
- cout<<"輸入錯誤!"<<endl;
- goto re;
- }
- checkout:
- cout<<endl<<"[購物清單]"<<endl;
- cout<<"-----------------------------"<<endl;
- for(int i=0; i<=6; i++)
- {
- if(qty[i]!=0) // != 不等於
- cout<<name[i]<<"\t"<<price[i]<<"元 * "<<qty[i]<<"個"<<endl;
- }
- cout<<"-----------------------------"<<endl;
- cout<<"總共 "<<sum<<"元!"<<endl<<endl;
- system("pause");
- return 0;
- }
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