如果该单元格值=450时,显示480,值=0时,显示为空,否则显示本身,请问怎么写呢
if($$$==450,480,if($$$==0,"",$$$))
if($$$=450,'480',if($$$=0,'',$$$))
if($$$ = 450,"480",if($$$ = 0,"","$$$"))