题目：

凑算式

     B      DEF
A + --- + ------- = 10
     C      GHI
这个算式中A~I代表1~9的数字，不同的字母代表不同的数字。

比如：
6+8/3+952/714 就是一种解法，
5+3/1+972/486 是另一种解法。

这个算式一共有多少种解法？
代码：
#include<iostream>
using namespace std;
int main()
{
    int a[9];//a[0]到a[8] 分别为A到I;
    int i,m,j;
    int sum=0;
    double s;
    for(a[0]=1;a[0]<=9;a[0]++)
    {
         for(a[1]=1;a[1]<=9;a[1]++)
         {
              for(a[2]=1;a[2]<=9;a[2]++)
              {
                   for(a[3]=1;a[3]<=9;a[3]++)
                   {
                        for(a[4]=1;a[4]<=9;a[4]++)
                        {
                             for(a[5]=1;a[5]<=9;a[5]++)
                             {
                                for(a[6]=1;a[6]<=9;a[6]++)
                                {
                                  for(a[7]=1;a[7]<=9;a[7]++)
                                  {
                                       for(a[8]=1;a[8]<=9;a[8]++)
                                       {
                                           s=a[0]+a[1]/(double)a[2]+(a[3]*100+a[4]*10+a[5])/(double)(a[6]*100+a[7]*10+a[8]);
                                           if(s==10)
                                           {
                                               for(i=0;i<8;i++)
                                               {
                                                   m=1;
                                                   for(j=i+1;j<9;j++)
                                                   {
                                                       if(a[i]==a[j])
                                                          {
                                                           m=0;
                                                           continue;
                                                          }
                                                   }
                                               }
                                               if(m)
                                                   sum++;
                                           }

                                       }
                                  }
                             }
                        }
                   }
              }
         }
    }
    }
    cout<<sum<<endl;
}
大神帮忙看下，谢谢。