qfedu-basic-level/day6/d1.cpp

// 按位取反
#include <iostream>

using namespace std;

int main()
{
    int n = 10;
    cout << "~10 = " << ~n << endl; // 取反
    n = -9;
    cout << "~-9 = " << ~n << endl; // 取反

    return 0;
}