编写五角数

五角数定义：n*(3*n-1)/2，编写程序显示前100个五角数，每行10个

这里我使用了printPentagonalNumber方法调用

package chap05;

public class PentagonalNumberMethod {

public static void main(String[] args) {

System.out.println(“The first 100 Pentagonal Number are \n”);

printPentagonalNumber(100);

}

public static void printPentagonalNumber(int n){

final int NUMBER_PER_LINE=10;

for(int i=1;i<=n;i++){
int temp=i*(3*i-1)/2;

if(i%NUMBER_PER_LINE==0){
System.out.println(temp);
}else
System.out.print(temp+" ");
}
}

}