cout << "answer question No.7\n\n";
		 char arr[SIZE2], i;
		 bool flag = true;

		 cout << "please enter " << SIZE2 << " characters: ";
		 for (i = 0; i < SIZE2; i += 1)
		 {
			 cin >> arr[i];
			 if ( arr[i] != arr[i - 1])
				 flag = false;
		 }
		 if (flag)
			 cout << "the chars are the same!" << endl;
		 else
			 cout << "the chars are difference!" << endl;
		 system("pause");
	 }