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

9 votes290 views5 answers
C++ cin cout
C++
4 votes321 views2 answers
C++ cin operator
C++
5 votes328 views6 answers
Do while loop c++
C++
0 vote334 views1 answer
Inverted triangle c++
C++
0 vote303 views1 answer
Cpp class access array member by different name
C++
2 votes295 views1 answer
Getch c++ library
C++
-1 vote337 views2 answers
How to delete a file in cpp
C++
0 vote311 views1 answer
What is stdoutread in c++
C++
0 vote282 views1 answer
1ll
C++
1 vote336 views1 answer
Cpp malloc
C++