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

2 votes122 views1 answer
Disable a warning in visual c++
C++
1 vote125 views1 answer
C++ vs c#
C++
0 vote124 views1 answer
C++ class constructor variable arguments
C++
15 votes112 views2 answers
Calculate factorial
C++
0 vote115 views1 answer
Automatic legend matlab
C++
0 vote141 views1 answer
How to convert n space separated integers in c++
C++
0 vote127 views1 answer
BMI Calculator Program in C++
C++
23 votes109 views6 answers
String to number in c++
C++
0 vote117 views3 answers
C to c++ online converter
C++
1 vote178 views1 answer
Heap pinter c++
C++