统计一段页码间出现0的次数

#include<iostream>#include<algorithm> using namespace std;const int N = 11;int d[11];int value;void deal(int n){   if(n<=0)return;   int one, ten;   one = n%10;   n = n/10;   ten = n;   for(int i=0; i<=one; i++)     d[i] += value;     while(ten)     {        d[ten%10] += (one+1)*value;        ten /= 10;     }     for(int i=0; i<10; i++)     d[i] += value*n;     d[0] -= value;     value *= 10;   deal(n-1);}int main(){int a, b;while(cin>>a>>b){   memset(d,0,sizeof(d));   value = 1;   deal(b);   value = -1;   deal(a-1);   cout<<d[0]<<endl;}system("pause");return 0;}