[網設]分數加總平均程式

This program can add and average the scores you give

1. score is null
The average score is NaN !!

感謝阿毛幫忙DEBUG

目前順利的運作了...XD

程式瑪：
<script type="text/javascript"> var grade; var grade; var sum=0; var n=0; var keep_on="Y"; grade=window.prompt("Please enter first score!",""); if(grade=="") document.write("There is no grade entered!"); else { n++; document.write(n+". score is "+grade+"<br/>"); sum=parseInt( grade)+parseInt(sum); while(1) { keep_on=window.prompt("Do you want to enter more score ? (N/Y)","Y"); if(keep_on=="Y") { grade=window.prompt("Please enter a score!",""); if(grade=="") document.write("There is no grade entered!<br/>"); else { n++; document.write(n+". score is "+grade+"<br/>"); sum=parseInt( grade)+parseInt(sum); } } else { break; } } document.write("The average score is "+sum/n+" !!<br/>"); } </script>