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View Code? Open in Web Editor NEW【C++面试&C++学习指南】 这里整理了C++后端研发工程师面试和工作必备的知识点 。
【C++面试&C++学习指南】 这里整理了C++后端研发工程师面试和工作必备的知识点 。
problems/如果A是某一个类的指针,那么在它等于nullptr的情况下能直接调用里面的A对应类里面的public函数吗.md
示例:
`#include
class A {
public:
void show() {
std::cout << "show!" << std::endl;
}
};
int main() {
A* a_ptr;
a_ptr->show();
return 0;
}`
实际调用的函数签名是A::show(this),相当于this地址未确定,但成员函数实际不需要this地址,这段代码依旧是可以正常执行的。
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