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

22 votes317 views2 answers
DateFormat in Flutter
C++
0 vote305 views1 answer
Print hola mundo
C++
-2 votes291 views2 answers
C++ random float
C++
3 votes298 views2 answers
Access last element of set c++
C++
1 vote313 views1 answer
Create random vectors c++
C++
28 votes317 views5 answers
Flutter date format
C++
0 vote320 views1 answer
C++counter
C++
0 vote308 views1 answer
C++ get environment variable
C++
0 vote342 views1 answer
What is the default include path in ubuntu c++
C++
25 votes288 views5 answers
Text-decoration
C++