java基础代码-打印图形-递归

public static void getPic(){
        System.out.println("请输入图形高度：");
        Scanner s = new Scanner(System.in);
if(s.hasNextInt()){
int num = s.nextInt();
for(int i=0;i<num;i++){
for(int j=i;j<num;j++){
                    System.out.print(" ");
                }
for(int k=0;k<2*i+1;k++){
                    System.out.print("*");
                }
                System.out.println("");
            }
            getCal();
        }else{
            System.out.println("拜托骚年，请输入数字!");
            getPic();
        }

    }

public static int count = 0;
public static void getCal(){
        Random r = new Random();
int num = r.nextInt(20)+1;
int num2 = (int)(Math.random()*100+1);
        System.out.println("请计算乘法："+num+"*"+num2+"=? ");
        Scanner s = new Scanner(System.in);
int result = s.nextInt();
if(result==num*num2){
            count++;
if(count==5){
                System.out.println("恭喜你，智商过线。");
            }else{
                System.out.println("答对了，请继续!");
                getCal();
            }
        }else{
            System.out.println("错误，大脑短路了？从新来过吧!");
            getPic();
        }
    }

public static void main(String[] args) {
        getPic();
    }