1 // 16_10jinzhi.cpp : 定义控制台应用程序的入口点。 2 // 3  4 #include "stdafx.h" 5 #include<iostream> 6 #include<string> 7 #include<math.h> 8 using namespace std; 9 10 11 int getNum(char c)12 {13     int temp = 0;14     switch(c)15     {16     case ‘A‘:17         temp = 10;18         break;19     case ‘B‘:20         temp = 11;21         break;22     case ‘C‘:23         temp = 12;24         break;25     case ‘D‘:26         temp = 13;27         break;28     case ‘E‘:29         temp = 14;30         break;31     case ‘F‘:32         temp = 15;33         break;34     case ‘0‘:35         temp = 0;36         break;37     case ‘1‘:38         temp = 1;39         break;40     case ‘2‘:41         temp = 2;42         break;43     case ‘3‘:44         temp = 3;45         break;46     case ‘4‘:47         temp = 4;48         break;49     case ‘5‘:50         temp = 5;51         break;52     case ‘6‘:53         temp = 6;54         break;55     case ‘7‘:56         temp = 7;57         break;58     case ‘8‘:59         temp = 8;60         break;61     case ‘9‘:62         temp = 9;63         break;64     }65     return temp;66 }67 68 int _tmain(int argc, _TCHAR* argv[])69 {70     string OX_num;71     while(cin>>OX_num)72     {73         int len =  OX_num.length();74         if(len <= 2)75             return -1;76         int result = 0;77         for(int i = 2; i < len;i++)78         {79             int temp = 0;80             if((OX_num[i]>=‘A‘ && OX_num[i] <= ‘F‘)||    (OX_num[i]>=‘0‘ && OX_num[i] <= ‘9‘) )81                 temp = getNum(OX_num[i]);82             else83                 return -1;84 85             result += temp*(pow(static_cast<double>(16),len - i - 1));86         }87         cout<<result<<endl;88     }89     return 0;90 }