hdu 4278

其实就是八进制换10进制

http://acm.hdu.edu.cn/showproblem.php?pid=4278

#include<iostream>#include<cstdio>#include<cstring>#include<cmath>using namespace std;int main(){int n;char num[15];while(scanf("%s",num)){if(num[0]=='0')break;int l=strlen(num);int i;int sum=0;for(i=0;i<l;i++){if(num[i]<'3')sum+=(int)(num[i]-'0')*pow(8.0,l*1.0-i-1);else if(num[i]<'8')sum+=(int)(num[i]-'0'-1)*pow(8.0,l*1.0-i-1);elsesum+=(int)(num[i]-'0'-2)*pow(8.0,l*1.0-i-1);}printf("%s: %d\n",num,sum);}}