Java用while循环打出等腰三角形

Question

如题所述

Answer 1

用for循环打的，改下就行了

import java.util.Scanner;
public class 等腰实心三角形{
public static void main(String[] args){
System.out.println("请输入行：");
Scanner sc=new Scanner(System.in);
int m=sc.nextInt();
for(int i=1;i<=m;i++){
//1.打印空格，空格=m-i，M是行
for(int j=1;j<=m-i;j++){
System.out.print(" ");

}
//2.打印*，2*i-1个
for(int k=1;k<=2*i-1;k++){
System.out.print("*");
}
//3.换行
System.out.println();
}
}
}

Answer 2

ublic class Sjiaox {
public static void main(String[] args) {
for (int i = 1; i <= 7; i++) {
for (int j = 1; j <= 7-i; j++) {
System.out.print(" ");
}
for (int ji = 1; ji <=2*i-1; ji++) {
System.out.print("*");
}
System.out.println();
}
}
}