package day01;

import java.util.Scanner;

public class xieyunchuang {

public static void main(String[] args) {

Scanner input=new Scanner(System.in);

int n;

System.out.println("输入您要的n");//

n=input.nextInt();

System.out.println("开始计算");

DoWhile(n);

Digui(n);

While(n);

System.out.println();

xunhuang(n);

}

private static void DoWhile(int n) {

int i=1;

int sum=1;

do {

sum=sum*i;

System.out.print(i+"*");

i++;

}while(i<n);

sum=sum*n;

System.out.println(n+"="+sum);

}

private static void Digui(int n) {

int sum;

sum=digui(n);

System.out.println(sum);

}

private static void While(int n) {

int i=1,sum=1;

while(i<n)

{

sum=sum*i;

System.out.print(i+"*");

i++;

}

sum=sum*n;

System.out.print(n+"="+sum);

}

private static void xunhuang(int n) {

int temp=1;

int sum=1;

for(int i=1;i<n;i++) {

sum=sum*i;

System.out.print(i+"*");

}

sum=sum*n;

System.out.print(n+"="+sum);

}

private static int digui(int n) {

if (n <= 0) {

return 0;

}

if (n == 1) {

System.out.print(n+"=");

return 1;

}

System.out.print(n+"*");

return n * digui(n-1);

}

}