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  • JAVA多态计算面积main函数调用方法

    public static void main(String[] args) {
    Shape shape;
    Scanner input = new Scanner(System.in);
    System.out.println("请选择图形(1、圆形 2、矩形 3、三角形)");
    int a = input.nextInt();
    if(a == 1){
    System.out.println("请输入圆形的边长:");
    double r = input.nextDouble();
    shape = new Round(r);
    shape.area();
    }else if(a == 2){
    System.out.println("请输入矩形的底:");
    double bottom = input.nextDouble();
    System.out.println("请输入矩形的高:");
    double high = input.nextDouble();
    shape = new Rectangle(bottom, high);
    shape.area();
    }else if(a == 3){
    System.out.println("请输入三角形的底:");
    double bottom = input.nextDouble();
    System.out.println("请输入三角形的高:");
    double high = input.nextDouble();
    shape = new Triangle(bottom, high);
    shape.area();
    }
    input.close();

    }

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  • 原文地址:https://www.cnblogs.com/ye34166684/p/5751703.html
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