Question

用JAVA编写杨辉三角

//打印杨慧三角形。
int width=10;
for (int i = 0; i < n; i++) {
for (int j = 0; j < (n - i)*width/2; j++)
System.out.print(" ");
for (int j = 0; j < i + 1; j++){
String formatter="%"+width+"d";
System.out.printf(formatter,array[i][j]);
}
System.out.print("\n");
}

}
}
我意思是这段输入什么意思

Answer 1

我的绝对正确 书上抄的 还验证过！
public static void main(String[]args){
int r=6;
int a[][]=new int[r+1][]; //表示6个一维数组组成
for(int i=0;i<=r;i++){
a[i]=new int[i+1];} //表示使用for循环为一维数组指定列数
YangHui(a,r);
}
static void YangHui(int a[][],int r){
for(int i=0;i<=r;i++){
for(int j=0;j<a[i].length;j++){
if(i==0||j==0||j==a[i].length-1)
a[i][j]=1;
else
a[i][j]=a[i-1][j-1]+a[i-1][j];
}
}
for(int i=0;i<=r;i++){
for(int j=0;j<a[i].length;j++){
System.out.print(a[i][j]+" ");}
System.out.println();}
}
}

Answer 2

public class Yhsanjiao{

static public void main(String[] args){
int[][] a=new int[10][10];
for(int i=0;i<10;i++)
for(int j=0;j<10;j++)
{
if (j<i)
{
a[i][j]=1;
if(j==0){
a[i][j]=1;
}else{
a[i][j]=a[i-1][j-1]+a[i-1][j];
}
}else{
a[i][j]=1;
}
}

for(int i=0;i<10;i++)
{
for(int k=1;k<=10-i;k++)
System.out.printf(" ");

for(int j=0;j<=i;j++){
System.out.printf("%3d ",a[i][j]);
}
System.out.printf("\n");
}
}
}

Answer 3

public static void main(String[] args) {
int[][] number = new int[12][];
int row, list;
number[0] = new int[1];//赋值前要初始化
number[1] = new int[2];//赋值前要初始化
number[0][0] = 1;
number[1][0] = 1;
number[1][1] = 1;
System.out.println(number[0][0]);
for (row = 2; row <= 11; row++) {
number[row] = new int[row + 1];//赋值前要初始化
number[row][0] = 1;
number[row][row] = 1;
System.out.print(number[row][0] + " ");
for (list = 1; list < row; list++) {//list位置要控制
number[row][list] = number[row - 1][list - 1]
+ number[row - 1][list];
System.out.print(number[row][list] + " ");
}
System.out.println();
}

}