(矩形的面积和周长)编写程序,使用以下公式计算并显示宽度为4.5、高度为7.9的矩形的面积和周长。
面积 = 宽 × 高
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package dome1_9;
/**
*
* @author Administrator
*/
public class Dome1_9 {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
double S = 0.0;
double perimeter = (4.5 + 7.9) * 2;
S = 4.5 * 7.9;
System.out.println("面积:" + S);
System.out.println("周长:" + perimeter);
}
}