Huawei machine test system conversion

Topic description

Write a program that accepts a string of hexadecimal values ​​and outputs a string of decimal values ​​for that value. (Multiple groups are input at the same time)

Enter description:

Enter a numeric string in hexadecimal.

Output description:

Output a decimal string of this value.

Example 1

enter

0xA

output

10

#include<bits/stdc++.h>
using namespace std;
int sum = 0;
void Zh(string s)
{
    reverse(s.begin(),s.end());
    int len = s.length();
    sum = 0;
    for(int i=0;i<len-2;i++)
    {
        int t;
        if(s[i]>='A'&&s[i]<='A'+6)
            t = s[i]-'A'+10;
        else
            t = s[i]-'0';
        //cout<<t<<endl;
        sum += pow(16,i)*t;
    }
    printf("%d\n",sum);
}
intmain()
{
    string s;
    while(cin>>s)
    {
        Zh (s);
    }
}