【整数各位和循环求在0-9范围】2024-10-27

缘由为什么把return sum变成变成cout sum就可以啊_编程语言-CSDN问答

int n = 0, ns = 0, h = 0;
std::cin >> n; ns = n;
xf:if (n > 9)
{
    if (ns)
        h += ns % 10, ns /= 10;
    else
        ns = n = h, h = 0;
    goto xf;
}
std::cout << n << "\n";