hdu 4278 2012天津赛区网络赛 数学 *

8进制转为10进制

 1 #include<cstdio>
 2 #include<iostream>
 3 #include<algorithm>
 4 #include<cstring>
 5 #include<cmath>
 6 #include<queue>
 7 #include<map>
 8 using namespace std;
 9 #define MOD 1000000007
10 const int INF=0x3f3f3f3f;
11 const double eps=1e-5;
12 typedef long long ll;
13 #define cl(a) memset(a,0,sizeof(a))
14 #define ts printf("*****\n");
15 const int N=1005;
16 int n,m,tt;
17 int digit[99];
18 int main()
19 {
20     int i,j,k,ca=1;
21     #ifndef ONLINE_JUDGE
22     freopen("1.in","r",stdin);
23     #endif
24     while(scanf("%d",&n)!=EOF&&n)
25     {
26         int temp=n;
27         int len=0;
28         int sum=0;
29         while(n)
30         {
31             digit[len++]=n%10;
32             if(digit[len-1]>3&&digit[len-1]<9)  digit[len-1]-=1;
33             if(digit[len-1]==9)digit[len-1]-=2;
34             n/=10;
35         }
36         for(i=len-1;i>=0;i--)
37         {
38             sum+=pow(8,i)*digit[i];
39         }
40         printf("%d: %d\n",temp,sum);
41     }
42 }