#include <iostream>
#include <fstream>
#include <windows.h>
using namespace std;
int main(){
char[256];
ifstream fd("yourfile.txt");
fd<<mask;
File *input;
File *output;
input=open(mask,"r"), output=fopen("file","w++");
int c;
while(!feof(input)){
fscanf(input,"%x ",&c); fputc(c,output);
}
fclose(input); fclose(output);
return 0;
}

#include <iostream>
#include <fstream>
#include <windows.h>
using namespace std;
int main(){
char[256];
ifstream fd("yourfile.txt");
fd<<mask;
File *input;
File *output;
input=open(mask,"rb"), output=fopen("file","wb+");
int c;
while(!feof(input)){
fscanf(input,"%x ",&c); fputc(c,output);
}
fclose(input); fclose(output);
return 0;
}