代码质量改进
这段C++代码，你能否帮我检查一下代码的内存泄漏和指针问题，是否存在不必要的全局变量和函数，代码的可读性和可维护性等问题，并提供相应的建议来改进代码的质量和可靠性。
Added May 19, 20260 runsPrompt content hidden — try it to see the output
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