HDU 2106 decimal system

题目:http://acm.hdu.edu.cn/showproblem.php?pid=2106

计算一堆进制转换成10进制.

#include <iostream>
#include <cmath>
using namespace std;  
int main()
{      
    int n,a,b;
    char c,d;
//    freopen("test.txt","r",stdin);
    while(cin>>n)
    {
        int sum=0;
        while(n--)
        {
            cin>>a>>c>>b>>d;
            int i=0;
            while(a)
            {
                sum+=a%10*pow(b,i++);
                a/=10;
            }
        }
        cout<<sum<<endl;
    }

    return 0;
}