function getLevel(score){
if(isNaN(score)||score<0||score>100) return "error"
var tempScore = parseInt(score)/10
switch (tempScore){
case 10: return "优"
case 9: return "优"
case 8: return "良"
case 7: return "一般"
case 6: return "及格"
default: return "不及格"
}
}
alert(getLevel(50.5))
</script>
int num=67String str if(num>=90){ str="优秀" }else if(num>=80){ str="优良"}else if(num>=70){ str="良好" }else if(num>=60){ str="合格" }else{ str="不合格" } System.out.println("成绩是 " + str)
