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分享一个简单的java计算问题
用Java计算3个长方形的面积和周长
import java.util.Scanner;
public class rectangle{
public static double getarea(double length, double width){
}
public static double getperimeter(double length, double width){
}
public static void main(String[]args){
Scanner input = new Scanner(System.in);
}}
import java.util.Scanner;
public class rectangle{
public static double getarea(double length, double width){
}
public static double getperimeter(double length, double width){
}
public static void main(String[]args){
Scanner input = new Scanner(System.in);
}}
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Game-Over 2014-02-24
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谢谢。。我已经解开了。。我之前就是不明白，因为我用了同样的方法不知道哪一步错了，就run不了，所以我就认为这个不可行了。呵呵。。。谢谢了！
Game-Over 2014-02-24
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对啊，这个就是我之前写的那个。所以说是没有简便的方法了是吗？？
ghostkngiht 2014-02-24
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public static void main(String[] args) {
Scanner input = new Scanner(System.in);
double length1 = input.nextDouble();
double width1 = input.nextDouble();
double length2 = input.nextDouble();
double width2 = input.nextDouble();
double length3 = input.nextDouble();
double width3 = input.nextDouble();
System.out.println("1面积：" + getarea(length1, width1));
System.out.println("1周长：" + getperimeter(length1, width1));
System.out.println("2面积：" + getarea(length2, width2));
System.out.println("2周长：" + getperimeter(length2, width2));
System.out.println("3面积：" + getarea(length3, width3));
System.out.println("3周长：" + getperimeter(length3, width3));
}
Game-Over 2014-02-24
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你好，你的code我看到了，我想问下可不可以一起输入，然后一起print出来？
姜小白- 2014-02-24
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将长，宽作为属性，将球周长，面积作为方法封装一个矩形Class出来，然后每次传参后，将参数转换为对象，通过对象去调用求周长和面积的方法。楼主看看java中类的概念吧，看完对这个应该就理解了。
ghostkngiht 2014-02-24
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public static double getarea(double length, double width) {
return length * width;
}
public static double getperimeter(double length, double width) {
return (length + width) * 2;
}
public static void main(String[] args) {
for (int i = 0; i < 3; i++) {
System.out.println("输入第" + (i + 1) + "个矩形的长和宽：");
Scanner input = new Scanner(System.in);
double length = input.nextDouble();
double width = input.nextDouble();
System.out.println("面积：" + getarea(length, width));
System.out.println("周长：" + getperimeter(length, width));
}
}
Game-Over 2014-02-24
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封装为对象，每次给传参就是了。楼上写了这么多重复的方法没必要。[/quote]
对不起。。我是新手，没有明白你说的封装和传参什么意思。可以解释一下么？
姜小白- 2014-02-24
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封装为对象，每次给传参就是了。楼上写了这么多重复的方法没必要。
Game-Over 2014-02-24
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我写了一个特别麻烦的，但是我想问下有没有简单的方法。
import java.util.Scanner;
public class rectangle{
public static double getarea(double length, double width){
return length*width;
}
public static double getarea1(double length1, double width1){
return length1*width1;
}
public static double getarea2(double length2, double width2){
return length2*width2;
}
public static double getperimeter(double length, double width){
return 2*length+2*width;
}
public static double getperimeter1(double length1, double width1){
return 2*length1+2*width1;
}
public static double getperimeter2(double length2, double width2){
return 2*length2+2*width2;
}
public static void main(String[]args){
Scanner input = new Scanner(System.in);
System.out.println("Please enter rectangle1's length: ");
double length=input.nextDouble();
System.out.println("Please enter rectangle1's width: ");
double width=input.nextDouble();
System.out.println("Please enter rectangle2's length: ");
double length1=input.nextDouble();
System.out.println("Please enter rectangle2's width: ");
double width1=input.nextDouble();
System.out.println("Please enter rectangle3's length: ");
double length2=input.nextDouble();
System.out.println("Please enter rectangle3's width: ");
double width2=input.nextDouble();
while(length != 0 ){
if (length==length){
System.out.println("The rectangle1's area is: "+getarea(length, width)+", perimeter is: "+getperimeter(length,width));
}
if (length==length){
System.out.println("The rectangle2's area is: "+getarea1(length1, width1)+", perimeter is: "+getperimeter1(length1,width1));
}
if (length==length){
System.out.println("The rectangle3's area is: "+getarea2(length2, width2)+", perimeter is: "+getperimeter2(length2,width2));
break;}
}
}}
