运行下列程序，其结果应该是 [15] 。
SET TALK OFF
CLEAR
STORE 2 TO X，Y
D0 WHILE.T.
Y=Y+3
DO CASE
CASE INT(Y/5)*5=Y
LOOP
CASE Y=10
EXIT
OTHERWISE
X=X+Y
ENDCASE
’X=’+STR(X，2)，’Y=’+STR(Y，2)
ENDDO
SET TALK ON．