var bmi = weight/(height*height); if(m < 18.5){ alert('过轻');}else if (m < 25){alert('正常');}else if(m<28){alert('过得重')}else if (m < 32){ alert('肥胖')}else{alert('严重肥胖')}
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愤怒的十二
var bmi = weight/(height*height); if(m < 18.5){ alert('过轻');}else if (m < 25){alert('正常');}else if(m<28){alert('过得重')}else if (m < 32){ alert('肥胖')}else{alert('严重肥胖')}