private void If_statement() {
System.out.print("if");
mustbe(TK.IF);
guarded_command();
while (is(TK.ELSEIF)) {
System.out.print("else if");
scan();
guarded_command();
}
if (tok.kind == TK.ELSE) {
System.out.print("else");
scan();
addBlock();
System.out.println("{");
block();
System.out.println("}");
removeBlock();
}
mustbe(TK.ENDIF);
}
private void Do_statement() {
System.out.print("while");
mustbe(TK.DO);
guarded_command();
mustbe(TK.ENDDO);
}
