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;
}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;
}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;
}Copyright © 2021 Codeinu
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