error:control reaches end of non-void function [-Werror=return-type]
问题场景描述：leetcode刷题时遇到这类报错，代码没问题，可就是编译不通过，很是怀疑人生。 问题解决：在函数的最后添加一条return语句，只要返回的数据类型对即可！记住，一定要返回，虽然永远也用不上。 虽然有时我们在一块程序里已经有return,但不是在这块代码的结尾，leetCode也会编译不通过。 所以我们也要在函数的代码块结尾也return一下。出现这种错误的时候，一般LeetCode
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- 1. control reaches end of non-void function
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