How to use boost:lexical_cast In C++
The boost:lexical_cast can convert a hex string to a signed integer. It uses stringstream behind the scenes.
Example:
C++
#include "boost/lexical_cast.hpp"#include <bits/stdc++.h>using namespace std;using boost::lexical_cast;int main() { string s1 = "0xFF"; unsigned int x = lexical_cast<unsigned int>(s1); cout << x << endl; } |
Output:
255
Explanation: The function’s working and structure are quite similar to the ones used in the stringstream method. The only difference here is that 0x has to be prepended to the hexadecimal string to make the lexical_cast function acknowledge the presence of a hexadecimal string. After which, the string is passed as an argument to the lexical_cast function, and its result is stored. In the end, the value associated with the hex code is displayed.
Convert Hex String to Signed Integer in C++
This article discusses converting a hex string to a signed integer in C++. There are 5 ways to do this in C++:
- Using stoi() function.
- Using stoul() function.
- Using sscanf() function.
- Using stringstream method.
- Using boost:lexical_cast.