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 vote170 views1 answer
How to know the number of a certain substring in a string in c++
C++
0 vote156 views1 answer
# in c++
C++
0 vote165 views1 answer
InstallUtil.exe ConsoleApp
C++
2 votes173 views1 answer
Check gpu usage jetson nano
C++
0 vote173 views1 answer
Use regex replace in c++
C++
1 vote171 views1 answer
Qtextedit no line break
C++
0 vote171 views1 answer
Getline(cin string) not working
C++
2 votes168 views1 answer
Get type of an object c++
C++
0 vote177 views1 answer
How to install opencv c++ on windows vscode
C++
4 votes175 views4 answers
Get list of files in directory c++
C++