java:or(int number = 100; number >= 1; number--) { System.out.println(number + " bottles of beer left!"); } 把这段换成while循环代码
时间: 2024-01-19 18:05:03 浏览: 26
Sure! 这是使用 while 循环的等效代码:
```
int number = 100;
while(number >= 1) {
System.out.println(number + " bottles of beer left!");
number--;
}
```
这段代码与原始代码的输出相同,只是循环结构不同。
相关问题
int i =1;while(i <5){for(int j=i;j>1;j- -)System.out.print(j+“”);System.out.println(“****”)i++;}
As an AI language model, I cannot execute the code above as it contains errors. Here is a corrected version of the code:
int i = 1;
while (i < 5) {
for (int j = i; j > 1; j--) {
System.out.print(j + " ");
}
System.out.println("****" + i);
i++;
}
The code above will print the following output:
****1
2 ****2
3 2 ****3
4 3 2 ****4
The code uses a nested loop to print a triangular pattern with decreasing numbers from the current row number to 1, followed by four asterisks and the row number. The outer loop controls the number of rows to print, and the inner loop prints the numbers in each row.
import java.util.Scanner; public class HollowDiamond { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.print("请输入菱形的大小(奇数):"); int size = scanner.nextInt(); if (size % 2 == 0) { System.out.println("请输入奇数大小!"); return; } int halfSize = size / 2; for (int i = 0; i <= halfSize; i++) { for (int j = halfSize; j > i; j--) { System.out.print(" "); } System.out.print("*"); if (i > 0) { for (int k = 1; k < 2 * i; k++) { System.out.print(" "); } System.out.print("*"); } System.out.println(); } for (int i = halfSize - 1; i >= 0; i--) { for (int j = halfSize; j > i; j--) { System.out.print(" "); } System.out.print("*"); if (i > 0) { for (int k = 1; k < 2 * i; k++) { System.out.print(" "); } System.out.print("*"); } System.out.println(); } } }
这段代码实现了一个空心菱形的输出。代码已经很简洁,但是可以对一些变量名进行改进和优化:
1. `size` 可以改为 `diamondSize`,更直观地表达变量的含义。
2. `halfSize` 可以改为 `halfDiamondSize`,更加直观地表达变量的含义。
3. 在第二个循环中,变量 `k` 可以改为 `j`,因为它是在同一级循环中使用的。
4. 在两个循环中,变量 `i` 可以改为 `row`,更加直观地表达变量的含义。
优化后的代码如下:
```java
import java.util.Scanner;
public class HollowDiamond {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("请输入菱形的大小(奇数):");
int diamondSize = scanner.nextInt();
if (diamondSize % 2 == 0) {
System.out.println("请输入奇数大小!");
return;
}
int halfDiamondSize = diamondSize / 2;
for (int row = 0; row <= halfDiamondSize; row++) {
for (int j = halfDiamondSize; j > row; j--) {
System.out.print(" ");
}
System.out.print("*");
if (row > 0) {
for (int j = 1; j < 2 * row; j++) {
System.out.print(" ");
}
System.out.print("*");
}
System.out.println();
}
for (int row = halfDiamondSize - 1; row >= 0; row--) {
for (int j = halfDiamondSize; j > row; j--) {
System.out.print(" ");
}
System.out.print("*");
if (row > 0) {
for (int j = 1; j < 2 * row; j++) {
System.out.print(" ");
}
System.out.print("*");
}
System.out.println();
}
}
}
```
这些变量名的改进可以使代码更加清晰易懂,也更符合规范。