Question

用JAVA计算一个矩形的面积?

Answer 1

//计算矩形的面积
public class RectArea {
public static double getArea(double width, double higth) {
double area = 0.0;// 矩形面积
// 判断输入是否合理
if (!(width <= 0 || higth <= 0)) {
area = width * higth;
return area;// 返回面积
} else {
System.out.println("请输入合理的长宽");
return -1;
}
}

public static void main(String[] args) {
//测试 宽：10.0 高：20.0
System.out.println("矩形面积" + RectArea.getArea(10.0, 20.0));
}
}

Answer 2

public class Rect
{
public static void main(String[] args){
int result=0;
result=count(2,3);
System.out.println(result);
}

public static int count(int x,int y){
int s;
s=x*y;
return s;
}
}

Answer 3

public float getRecArea(float w,float h)
{
return w*h;
}

Answer 4

LS的两位注意下恶意的输入判断