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易错点(wa了9次的总结)

Posted by 2857 at 2012-10-30 10:33:29 on Problem 1489
1 输入以空行结束,所谓空行,不是什么都没有,而是有一个回车换行符'\n',不能用gets(str1)!=NULL 判断结束
2 两个数较大时,乘机会超出int范围

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