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谁能告诉我这是为什么 讨厌的getline

Posted by xiaxia at 2006-04-09 16:31:09 on Problem 1298
总觉得getline有问题  
如果输入 

START
NS BFW, JAJSYX TK NRUTWYFSHJ FWJ YMJ WJXZQY TK YWNANFQ HFZXJX
END



  while(cin >> s &&  s !=  "ENDOFINPUT")
// 这一步 s = START 没错
//下一个循环这里的S = “BFW,"吃掉第二个。
	{
		getline(cin, input);
//第一次可是getline后 input竟然是空的  设么都没有
//第二次此时input = "JAJSYX TK NRUTWYFSHJ FWJ YMJ WJXZQY TK YWNANFQ HFZXJX" 已经不完整了
		int i, k;
		for(i =  0; i < input.length(); i ++)
		{
			if(input[i] >= 'A' && input[i] <= 'Z')
			{
                 k = input[i] - 'A';
				 k = ((k - 5) + 26)%26;
				 input[i] = 'A' + k;
			}
		}
  //上面循环自然不进行了
		cout << input << endl;
//输出个空循环
        cin >> s;
//这是的s = "NS"把一行的吃掉前一个单词
	}  

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