本周学习内容[banner第一周]

• 1.学习内容
• • 2.学习方式

本周着重对JAVA流程控制的学习，初步掌握了if语句·switch语句·while语句·do-while语句·for语句。

import java.util.*;
public class A
{
	public static void main(String[] args)
{
	int grade;
	Scanner reader=new Scanner(System.in);
	System.out.println("please input grade:");
	grade=reader.nextInt();
	switch(grade)
{
	case 100:
	case 99:
	case 98:
	case 97:
	case 96:
	case 95:
	case 94:
	case 93:
	case 92:
	case 91:
	case 90:
	    System.out.println("A!");
		break;
	case 89:
	case 88:
	case 87:
	case 86:
	case 85:
	case 84:
	case 83:
	case 82:
	case 81:
	case 80:
	 System.out.println("B!");
		break;
	case 79:
	case 78:
	case 77:
	case 76:
	case 75:
	case 74:
	case 73:
	case 72:
	case 71:
	case 70:
	  System.out.println("C!");
		break;
	case 69:

	case 68:
	case 67:
	case 66:
	case 65:
	case 64:
	case 63:
	case 62:
	case 61:
	case 60:
 	  System.out.println("D!");
		break;
	default:
  	   System.out.println("E!");
}
}
}

import  java.util.*;
public class B
{
	public static void main(String[] args)
{
	int a;
	Scanner buf=new Scanner(System.in);
	     a=buf.nextInt();
             do
	{    System.out.println("please input integer:");
	     a=buf.nextInt();
	}while(a<0||a>100);
		if(a%3==0&&a%7==0)
{
	System.out.println("yes,it is."+"  "+a);
}
		else
{
	System.out.println("no,it not."+"  "+a);
}
}
}

public class E
{	
	public static void main(String[] args)
{
	int i=0,sum=0;
       do{
     	i++;
	System.out.println(i);
	sum+=i;
}while(i<=100);
System.out.println("sum="+sum);
}
}
public class G
{
	public static void main(String[] args)
  {
	int a=1,b=2,c=3,max,min;
	max=a>b?a:b;
	max=c>max?c:max;
		System.out.println("Max"+"="+max);
	min=a