問題描述：如下圖

程序代碼：/* *問題描述：POJ1013稱硬幣 */ #include <iostream> #include <cstring> using namespace std; char Left[3][7];//天平左邊硬幣 char Right[3][7];//天平右邊硬幣 char result[3][7];//存儲結果 bool IsFake(char c,bool light) {//light為真表示假設假幣為輕，light為假表示假幣為重     for(int i = 0; i<3; ++i)//三次稱量結果，循環3次     {         char *pLeft,*PRight;//指向天平兩邊的字符串         if(light)         {             pLeft = Left[i];             pRight = Right[i];         }         else//如果假設假幣是重的，則把稱量結果左右對換         {             pLeft = Right[i];             pRight = Left[i];         }         switch(result[i][0])         {         case 'u':            if(strchr(pRight,c)==NULL)                return false;            break;         case 'e':            if(strchr(pLeft,c)||strchr(pRight,c))                return false;            break;         case 'd':            if(strchr(pLeft,c)==NULL)                return false;            break;         }     }     return true; } int main() {     int t;//表示有幾組數據     cin>>t;     while(t--)     {         for(int i = 0; i<3; ++i)            cin>> Left[i] >>Right[i] >>result[i];         for(char c= 'A';c<='L';c++)         {             if(IsFake(c,true))             {                 cout<<"Output:"<<endl;                 cout<<c<<" is the counterfeit coin and it is light./n";                 break;             }             else if (IsFake(c,false))             {                 cout<<"Output:"<<endl;                 cout<<c<<" is the counterfeit coin and it is heary./n";                 break;             }         }     }     return 0; }運行結果：