单选题

下面C程序的输出结果是 unsigned fun(unsigned) i...

Question

下面C程序的输出结果是

unsigned fun(unsigned)
int main()
{
    unsigned num = 26
    printf("%d", fun(num))
    return 0
}
unsigned fun(unsigned num)
{
    unsigned k = 1
    do
    {
        k *= num % 10
        num /= 10
    } while (num)
    return(k)
}

A. 12

B. 无限循环

C. 1

D. 26