缘由https://ask.csdn.net/questions/7885083/54066929
cpp
`void 卡片拼数字()
{
int a[10]{}, z = 1, x = z, s = 0; bool k = 1;
zu:if (k)
{
if (x == 0)
{
std::cout << z << (++s == 14 ? "\n" : "\t");
if (s == 14)s = 0;//每14个一行观察
++z, x = z;
}
if (a[x % 10] == 2021)
k = 0;
else
++a[x % 10], x /= 10;
goto zu;
}
}`
