c++学习笔记——一种非法的类型转换

#include <iostream>
#include <string>
#include <vector>
using namespace std;

int main(int argc, const char *argv[])
{
double d = static_cast<double>(12);

size_t s = static_cast<size_t>(d);

//一下转换非法
int i;
int *ptr = &i;
char *str = static_cast<char*>(ptr);

return 0;
}