c++空指针和野指针

空指针和野指针在C语言中是两个不同的概念。空指针是指被赋值为NULL的指针，它不指向任何的对象或函数。当我们使用指针时，首先需要检查这个指针是否为空指针，以避免访问不存在的地址引发程序崩溃。在C标准中，空指针的值通常为0。判断空指针的方法可以使用if(p != NULL)来检测指针是否为空。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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