How to convert a hex file into a binary file?

Question

I have a file with hex numbers as follows:

00042980 
00020000 
00020000 
00028000 
00020008 
00021000 
01028000 
00000000 
00000000 

In this same exact fashion.
How do I read this file in binary in C++?

Answer 1

You can use the std::hex manipulator:

#include <fstream>
#include <iostream>

using std::cout;
using std::hex;
using std::ifstream;

int main() {
    ifstream input("file");
    int data;
    while(input >> hex >> data) {
        cout << data << std::endl;
    }
}