//阿尔法乘积
#include<stdio.h>
int alpha(long long int x){
if(x<10)
return x;
else{
long n = 1;
while(x){
if(x%10 != 0){
n *= x%10;
x /= 10;
}
else
x /= 10;
}
return alpha(n);
}
}
int main(){
long long int x;
scanf("%ld",&x);
printf("%d",alpha(x));
return 0;
}
原文：https://www.cnblogs.com/Hqx-curiosity/p/12235001.html