import java.util.Scanner;
class Para{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
int[][] arr = new int[n][n];
for(int i=0;i<n;i++){
for(int j=0;j<=i;j++){
if(j==0){
arr[i][j]=1;
System.out.println();
}
else if(j==arr[i].length-1){
arr[i][j]=1;
}
else if(i>2){
arr[i][j]=arr[i-1][j] + arr[i-1][j-1];
}
System.out.print(arr[i][j]);
}
}
}
}
打印出来的是这样的
1
10
100
1100
12100
133100
1464100
1510105100
161520156101
class Para{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
int[][] arr = new int[n][n];
for(int i=0;i<n;i++){
for(int j=0;j<=i;j++){
if(j==0){
arr[i][j]=1;
System.out.println();
}
else if(j==arr[i].length-1){
arr[i][j]=1;
}
else if(i>2){
arr[i][j]=arr[i-1][j] + arr[i-1][j-1];
}
System.out.print(arr[i][j]);
}
}
}
}
打印出来的是这样的
1
10
100
1100
12100
133100
1464100
1510105100
161520156101
printYFTriangle();
} /**
* 1 要理解下面的实现,首先要明白int数组中元素默认值为 0
* 2 然后每一次迭代打印新的一行的元素的时候:
* 新的特定位置的元素 = 该位置原来的元素 + 该位置的前一个位置的值
*/
public static void printYFTriangle(){
System.out.println("how many lines you want:");
Scanner in = new Scanner(System.in);
int lines = in.nextInt();
int[] a = new int[lines + 1];
int previous = 1;
for (int i = 1; i <= lines; i ++){
for (int j = 1; j <= i; j++){
int current = a[j];
a[j] = previous + current;
previous = current;
System.out.print(a[j] + " ");
}
System.out.println();
}
}}
import java.util.Scanner;
public class YFTriangle {
public static void main(String[] args) {
printYFTriangle();
}
/**
* 1 要理解下面的实现,首先要明白int数组中元素默认值为 0
* 2 然后每一次迭代打印新的一行的元素的时候:
* 新的特定位置的元素 = 该位置原来的元素 + 该位置的前一个位置的值
*/
public static void printYFTriangle(){
System.out.println("how many lines you want:");
Scanner in = new Scanner(System.in);
int lines = in.nextInt();
int[] a = new int[lines + 1];
int previous = 1;
for (int i = 1; i <= lines; i ++){
for (int j = 1; j <= i; j++){
int current = a[j];
a[j] = previous + current;
previous = current;
System.out.print(a[j] + " ");
}
System.out.println();
}
}
}