0xff转换成bool会是多少？

#include <iostream>
#include <cstdint>

using namespace std;


int main()
{
	uint8_t isWaitLoad = 0xff;
	cout <<  (uint16_t)isWaitLoad << "  to bool is " << static_cast<bool>(isWaitLoad) << endl;
	
	isWaitLoad = 0;
	cout << (uint16_t)isWaitLoad << "  to bool is " << static_cast<bool>(isWaitLoad) << endl;
	
	isWaitLoad = 1;
	cout << (uint16_t)isWaitLoad << "  to bool is " << static_cast<bool>(isWaitLoad) << endl;
	
	return 0;
}

输出：

$ ./0xff_to_bool.exe
255  to bool is 1
0  to bool is 0
1  to bool is 1