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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林_成
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"); };