var bmi = weight/height/height; if (bmi<18.5){ alert('过轻')}else if (bmi<25){ alert('正常')}else if (bmi<28){ alert('过重')}else if (bmi<32){ alert('肥胖')}else { alert('严重肥胖')}
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Victoria_喵
var bmi = weight/height/height; if (bmi<18.5){ alert('过轻')}else if (bmi<25){ alert('正常')}else if (bmi<28){ alert('过重')}else if (bmi<32){ alert('肥胖')}else { alert('严重肥胖')}