学院c语言实验报告选择结构程序设计

一、

scanf("%lf", x); 改为scanf("%lf", &x);

y = 1 / x 没加分号

二、if( a + b > c || b + c > a || a + c > b)改成if( !(a + b > c || b + c > a || a + c > b) )

package MyShape;

public class Test {

/

@param args

/

public static void main(String[] args) {

Circle c = new Circle(2,4,3);

cprintItMyWay();

}

}

abstract class Shape{

public abstract float getCir();

public abstract float getArea();

}

class Point extends Shape implements Printable{

public int x;

public int y;

public Point(int x, int y){

thisx= x;

thisy=y;

}

public Point (){

}

@Override

public float getCir() {

// TODO Auto-generated method stub

return 0;

}

@Override

public float getArea() {

// TODO Auto-generated method stub

return 0;

}

public int getX() {

return x;

}

public void setX(int x) {

thisx = x;

}

public int getY() {

return y;

}

public void setY(int y) {

thisy = y;

}

@Override

public void printItMyWay() {

Systemoutprintln(" Point ("+x+","+y+")");

Systemoutprintln(" Point Area:"+thisgetArea());

Systemoutprintln(" Point Circle:"+thisgetCir());

}

}

class Circle extends Point implements Printable{

public float r ;

public Circle(){

}

public Circle(float r,int x, int y ){

      if(r>0){

      thisr =r;

      thisx =x;

      thisy=y;

}

}

public float getR() {

return r;

}

public void setR(float r) {

thisr = r;

}

@Override

public float getArea() {

return (float) (rr314/2);

}

@Override

public float getCir() {

return (float) (314r2);

}

@Override

public void printItMyWay() {

Systemoutprintln(" Circle ("+x+","+y+")");

Systemoutprintln(" Circle R:"+r);

Systemoutprintln(" Circle Area:"+thisgetArea());

Systemoutprintln(" Circle Circle:"+thisgetCir());

}

}

interface Printable {

public void printItMyWay();

}

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