一文搞懂C++中的四种强制类型转换

int main()
{
	int a = 97;
	char ch = a;	// 隐式类型转换
	int b = (int)ch;	// 显示类型转换 

	cout << "a = " << a << endl;
	cout << "ch = " << ch << endl;
	cout << "b = " << b << endl;

	int num = 10;
	int* p = &num;
	// int ret = p; Error,因为p的类型和ret的类型不一致，所以隐式转换失败
	int ret = (int)p;

	cout << "num = " << num << endl;
	cout << "&num = " << &num << endl;
	cout << "p = " << p << endl;
	cout << "ret = " << ret << endl;

	return 0;
}

int main()
{
	int i = 97;
	char ch = static_cast<char>(i);

	cout << "i = " << i << endl;
	cout << "ch = " << ch << endl;

	return 0;
}

int main()
{
	int i = 97;
	// char ch = reinterpret_cast<char>(i); // Error 这样的转换类型属于无效转换类型
	int* p = reinterpret_cast<int*>(i);

	cout << "i = " << i << endl;
	cout << "&i = " << &i << endl;
	cout << "p = " << p << endl;

	return 0;
}