java 循环结构（二）关于for语句的运用，以下例子让你充分理解for循环

标签：java

输出         

import java.util.Scanner;
public class text10{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int i,j,n;
		n=sc.nextInt();
		for(i=1;i<=n;i++)
		{
		for(j=1;j<=n;j++)
		{
			System.out.print(i);
		}
		System.out.println();
		}
	}
}

import java.util.Scanner;
public class text11 {
	public static void main(String[] args) {
    Scanner sc=new Scanner(System.in);
    int i,j,n;
    n=sc.nextInt();
    for(i=1;i<=n;i++)
    {
    	for(j=1;j<=n-i;j++)
    		System.out.print(' ');
    	for(j=1;j<=2*i-1;j++)
    		System.out.print('*');
    	System.out.println();
    }
	}

}

import java.util.Scanner;
public class text12 {
	public static void main(String[] args) {
    Scanner sc=new Scanner(System.in);
    int i,j,n;
    n=sc.nextInt();
    for(i=1;i<=n;i++)
    {
    	for(j=1;j<=i;j++)
    		System.out.print(j);
    	System.out.println();
    }
	}

}

import java.util.Scanner;
public class text13 {
	public static void main(String[] args) {
    Scanner sc=new Scanner(System.in);
    int i,j,n;
    n=sc.nextInt();
    for(i=n;i>=1;i--)
    {
      for(j=1;j<=n-i;j++)
    	  System.out.print(' ');
      for(j=1;j<=i;j++)
    	  System.out.print(j);
      System.out.println();
    }
	}
}

import java.util.Scanner;
public class text14 {
	public static void main(String[] args) {
    Scanner sc=new Scanner(System.in);
    int i,j,n;
    n=sc.nextInt();
    for(i=1;i<=n;i++)
    {
    	for(j=n-i;j>=1;j--)
    		System.out.print(' ');
    	for(j=1;j<=2*i-1;j++)
    		System.out.print(i);
    	System.out.println();
    }
    for(i=n-1;i>=1;i--)
    {
    	for(j=n-i;j>=1;j--)
    		System.out.print(' ');
    	for(j=1;j<=2*i-1;j++)
    		System.out.print(i);
    	System.out.println();
    }
    }
	}

输出

import java.util.Scanner;
public class text15 {
	public static void main(String[] args) {
    Scanner sc=new Scanner(System.in);
    int i,j,n;
    n=sc.nextInt();
    for(i=1;i<=n;i++)
    {
    	for(j=n-i;j>=1;j--)
    		System.out.print(' ');
    	System.out.print(i);
    	for(j=2*i-3;j>=1;j--)
    		System.out.print(' ');
    	if(i!=1) System.out.print(i);
    	System.out.println();
    }
    for(i=n-1;i>=1;i--)
    {
    	for(j=n-i;j>=1;j--)
    		System.out.print(' ');
    	System.out.print(i);
    	for(j=2*i-3;j>=1;j--)
    		System.out.print(' ');
    	if(i!=1) System.out.print(i);
    	System.out.println();
    }
	}

}

public class text16 {
	public static void main(String[] args) {
    int x,y,z;
    for(x=0;x<=50;x++)
    	for(y=0;y<=50;y++)
    		for(z=0;z<=50;z++)
    			if(x+y+z==50)
System.out.println("一分="+x+"两分="+y+"五分="+z);
	}

}

java 循环结构（二）关于for语句的运用，以下例子让你充分理解for循环

标签：java

原文地址：http://blog.csdn.net/qq_24928451/article/details/44873043