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首先提出解决方案:
这几个有什么不同呢?下面测试对比。 这两个函数都是从字符串开始寻找数字或者正负号或者小数点,遇到非法字符终止。 所以到上述s字符就不输出了,提前结束,也就是说当你的字符串不是数字的时候,或者小数点等非数字,不会报异常!直接输出0. 在C++中 ...
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