高手帮忙

#include <iostream.h>
const int N=5;
struct Shop
{
     int id;
     char name[20];
     int pri;
} mer[N] = {{1, "衣服", 100},
             {2, "食品", 20},
             {3, "汽车", 10000},
             {4, "房子", 20000},
             {5, "装饰", 500},
             };////////////////////////////定义商品
Shop mar[10];
void main()
{
    
     char ch;
    
     int c=0,s=0;
     do
     {
         int Count = 0;
         cout<<"Do you want to play? (y/n)\n";///////开始游戏
         ch = cin.get();
        
         if(ch == 'N' || ch == 'n')
             break;
         ///////////选择开启
         int n=N+1 ;
         while(n > N)
         {
             cout<<"Please chose number: (1~5)\n";
             cin>>n;
            
         }/////////选择商品
        
         cout<<mer[n].name<<'\n';/////多10次猜的机会，如果10次都没猜
         do
         {
             cin>>c;
             cin.get();
             if(c > mer[n-1].pri)
                 cout<<"Wrong!, Big\n";
             else if(c < mer[n-1].pri)
                 cout<<"Wrong! Small\n";
             else
             {