Convert from hex to decimal c++

Convert a hexadecimal number into decimal c++

#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
    int x;
    cin >>hex >> x;
    cout << x << endl;
    return 0;
}

Source: stackoverflow.com

Convert from hex to decimal c++

#include <iostream>
#include <string>
#include "math.h"
using namespace std;
unsigned long hex2dec(string hex)
{
    unsigned long result = 0;
    for (int i=0; i<hex.length(); i++) {
        if (hex[i]>=48 && hex[i]<=57)
        {
            result += (hex[i]-48)*pow(16,hex.length()-i-1);
        } else if (hex[i]>=65 && hex[i]<=70) {
            result += (hex[i]-55)*pow(16,hex.length( )-i-1);
        } else if (hex[i]>=97 && hex[i]<=102) {
            result += (hex[i]-87)*pow(16,hex.length()-i-1);
        }
    }
    return result;
}

int main(int argc, const char * argv[]) {
    string hex_str;
    cin >> hex_str;
    cout << hex2dec(hex_str) << endl;
    return 0;
}

Source: stackoverflow.com

Similar codes

0 vote130 views1 answer
C++ asio read full socket data into buffer
C++
-1 vote119 views1 answer
Cod Cold War no recoil
C++
3 votes126 views2 answers
Pre increment vs post increment c++
C++
0 vote138 views1 answer
Ue4 c++ string from fvector
C++
-1 vote125 views2 answers
Casting cpp
C++
3 votes120 views1 answer
Abs c++
C++
0 vote143 views1 answer
Unique_ptr syntax
C++
-1 vote126 views2 answers
Balanced parentheses
C++
0 vote120 views1 answer
Hashset in cpp
C++
0 vote122 views1 answer
Copying a set to vector in c++
C++