<!DOCTYPE HTML><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>返回值函數(shù)</title><script type="text/javascript">? function ?app2(x,y)? { var sum,x,y;? ? sum = x * y;? ?document.write("req1的值:"+req1+"<br/>");? ?document.write("req2的值:"+req2+"<br/>");? ?document.write(req1+"與"+req2+"和:"+sumq);? }? ? ? req1=app2(5,6)? ? ? req2=app2(2,3)? ? ? sumq=req1*req2</script></head><body></body></html>
為什么顯示不出來？
陽火鍋
2017-12-13 13:42:56