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private static void bmi(){        Scanner scanner = new Scanner(System.in);        System.out.println("请输入体重:单位(kg)");        float weight = scanner.nextFloat();        System.out.println("请输入身高:单位(m)");        float height = scanner.nextFloat();//        double weight = 76.5;   //单位:千克//        double height = 1.71;   //单位:米        double bmi = weight / (height * height);        double overLowNo = 18.5;        double normalNo = 25;        double overWeightNo = 28;        double fatNo = 32;        String overLow = "过低:低于" + overLowNo;        String normal = "正常:" + overLowNo + "-" + normalNo;        String overWeight = "过重:" + normalNo + "-" + overWeightNo;        String fat = "肥胖:" + overWeightNo + "-" + fatNo;        String overFat = "非常肥胖:高于"+fatNo;        String result = "";        if(bmi < overLowNo){            result = overLow;        }else if(bmi < normalNo){            result = normal;        }else if(bmi < overWeightNo){            result = overWeight;        }else if(bmi < fatNo){            result = fat;        }else{            result = overFat;        }        System.out.println(result);    }

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