#include <string.h>
#include <stdio.h>
#include <stdlib.h>
 
char* bin(const char* name )
{
     char buffer[10064] = { '\0' };
     buffer[0] = ' ';
     char* pbuffer = buffer;
     int len = strlen( name );
 
     for( int i = 0; i < len; i++ )
     {
        sprintf( pbuffer, "%02X", name[i] );
        pbuffer += 2;
     }
 
     return strdup( buffer );
}
 
int main()
{
   char* c = bin("ciao");
   printf("%s\n", c );
   free( c );
   return 0;
}

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