用java打印出杨辉三角
时间: 2024-03-09 13:21:56 浏览: 18
以下是使用Java打印杨辉三角的代码:
```java
import java.util.Scanner;
public class YangHuiTriangle {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("请输入杨辉三角的行数:");
int n = sc.nextInt();
int[][] arr = new int[n][n];
for (int i = 0; i < n; i++) {
arr[i][0] = 1;
arr[i][i] = 1;
}
for (int i = 2; i < n; i++) {
for (int j = 1; j < i; j++) {
arr[i][j] = arr[i - 1][j - 1] + arr[i - 1][j];
}
}
for (int i = 0; i < n; i++) {
for (int j = 0; j <= i; j++) {
System.out.print(arr[i][j] + " ");
}
System.out.println();
}
}
}
```
运行程序后,会提示用户输入杨辉三角的行数,例如输入5,则程序会输出如下结果:
```
1
1 1
1 2 1
1 3 3 1
1 4 6 4 1
```