Problem Description:
write a program that accepts a hexadecimal value string and outputs the decimal string of the value (note that there may be multiple sets of data in a test case).
Input:
0xa
Output:
10
#include <cstdio>
#include <iostream>
#include <vector>
#include <string>
using namespace std;
vector<char> conclude;
int CharToInt(char x){
if (x >= '0' && x <= '9'){
return x - '0';
}else{
return x - 'A' + 10;
}
}
void Convert(string str, int x){
int number = 0;
for(int i = 0; i < str.size(); ++i){
number *= x;
number += CharToInt(str[i]);
}
printf("%d\n", number);
}
int main(){
string str;
while (cin >> str){
str = str.substr(2);
Convert(str, 16);
}
return 0;
}