直接上代码
package test1;
public class 周长面积计算器 {
public static void main(String[] args) {
//下面是圆
final double π = 3.14;
int r = 100;
int d = 2*r;
double yuanzhouchang = d*π;
double yuanmianji = π*r*r;
System.out.println("这个圆的周长是："+yuanzhouchang);
System.out.println("这个圆的面积是："+yuanmianji);
//下面是长方形
int a = 11;
int b = 22;
int changfangxingzhouchang = (a+b)*2;
int changfangxingmianji = a*b;
System.out.println("这个长方形的周长是："+changfangxingzhouchang);
System.out.println("这个长方形的面积是："+changfangxingmianji);
//下面是正方形
int c = 13;
int zhengfangxingzhouchang = 4*c;
int zhengfangxingmianji = c*c;
System.out.println("这个正方形的周长是："+zhengfangxingzhouchang);
System.out.println("这个正方形的面积是："+zhengfangxingmianji);
//下面是三角形
double e = 130;//这是底边长度
double h = 56;
double f = 120;//这是1号斜边
double g = 110;//这是1号斜边
double sanjiaoxingzhouchang = e+f+g;
double sanjiaoxingmianji = e*h/2;
System.out.println("这个三角形的周长是："+sanjiaoxingzhouchang);
System.out.println("这个三角形的面积是："+sanjiaoxingmianji);
//下面是平行四边形
int i = 100;//这是底边长度
int j = 200;//这是高
int k = 150;//这是斜边
int pingxingsibianxingzhouchang = i+i+k+k;
int pingxingsibianxingmianji = i*j;
System.out.println("这个平行四边形的周长是："+pingxingsibianxingzhouchang);
System.out.println("这个平行四边形的面积是："+pingxingsibianxingmianji);
}
}
上面的参数可以自行更改
