do_something(a,b)
      /* This function does something with a and b*/
          {
          int ret;
          char arg1[10];
          char arg2[10];

          /* Turn the arguments to strings */
          sprintf(arg1,"%d",a);
          sprintf(arg2,"%d",b);

          /* Execute the program */
          if (fork() == 0)
               execlp("domain","domain",arg1,arg2);

          /* Wait till it is finished and get the return code */
          wait(&ret);                         

          /* Shift it over, as the return code is in 
                the high order bits */         
          ret >> 8 && 0xFF;

          return ret;
          }