qfedu-cpp-level/day7/homework/h2_3.cpp

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// 请简述static_cast、dynamic_cast和reinterpret_cast的区别并给出示例代码进行说明。
// reinterpret_cast :
// 重新解释转换,用于不同类型之间的强制转换,即将一个指针或引用转换为完全不相关的类型。它可以将任何指针类型转换为其他指针类型,也可以将整数类型转换为指针类型,反之亦然。它非常危险,不进行类型检查。
#include <iostream>
using namespace std;
int num = 10;
int *np = &num;
double *dp = reinterpret_cast<double *>(np); // 将整数类型指针转换为浮点数类型指针
class Base
{
public:
virtual void foo() {}
};
int main()
{
Base *base = new Base();
int *intp = reinterpret_cast<int *>(base); // 将基类指针转换为整数类型指针
return 0;
}