Decimal to hex conversion c++ built-in function
Is there a built-in function in c++ that would take a decimal input from a user and convert it to hex and vice versa?? I have tried it using a function I've written but I was wondering if there is a built-in one to minimize the code a little bit. Thanks in advance.
Solution 1:
Decimal to hex :-
std::stringstream ss;
ss<< std::hex << decimal_value; // int decimal_value
std::string res ( ss.str() );
std::cout << res;
Hex to decimal :-
std::stringstream ss;
ss << hex_value ; // std::string hex_value
ss >> std::hex >> decimal_value ; //int decimal_value
std::cout << decimal_value ;
Ref: std::hex
, std::stringstream
Solution 2:
Many compilers support the itoa
function (which appears in the POSIX standard but not in the C or C++ standards). Visual C++ calls it _itoa
.
#include <stdlib.h>
char hexString[20];
itoa(value, hexString, 16);
Note that there is no such thing as a decimal value or hex value. Numeric values are always stored in binary. Only the string representation of the number has a particular radix (base).
Of course, using the %x
format specifier with any of the printf
functions is good when the value is supposed to be shown in a longer message.