<?
 $datas = Array("홍길동"=>30,"강경태"=>80,"윤상혁"=>70,"홍진의"=>80,"이의경"=>10);

 function totaljum($data){
  $tempTotal = 0;

  foreach($data as $name => $val){
   $tempTotal += $val;
  }

  return $tempTotal;
 } 

 function average($data,$total){
  $totalEnt = count($data);
  $tempAvg = round($total/$totalEnt);

  return $tempAvg;
 }

 function sorts($data){
  $cnt = 1;
  array_multisort($data,SORT_DESC);
  reset($data);

  foreach($data as $name => $val){
   printf("%d 등 : %s %d<br>",$cnt,$name,$val);
   $cnt++;
  }
 }

 $totalJum = totaljum($datas);
 $avg = average($datas,$totalJum);
 

 printf("총 점 : %d<br>평 균 : %d<br>",$totalJum,$avg);
 sorts($datas);

?>