软件工程个人作业03

package size;

import java.util.Random;
import java.util.Scanner;

public class size {
	public static void main(String[] args){
		Random rand=new Random();
		size b=new size();
		System.out.println("请选择：1:2位数运算2:多位数运算");
		Scanner input1=new Scanner(System.in);
		int c=input1.nextInt();
		if(c==1)
		{
			System.out.println("请选择出题数量:");
			Scanner input6=new Scanner(System.in);
			int c5=input6.nextInt();
			System.out.println("请输入数值范围(最大值)");
			Scanner input3=new Scanner(System.in);
			int c2=input3.nextInt();
			System.out.println("请选择:1:有乘除法2:无乘除法");
			Scanner input2=new Scanner(System.in);
			int c1=input2.nextInt();
			System.out.println("请选择1:加减有负数2:加减无负数");
			Scanner input4=new Scanner(System.in);
			int c3=input4.nextInt();
			System.out.println("请选择:1.除法有余数2.除法无余数");
			Scanner input5=new Scanner(System.in);
			int c4=input5.nextInt();
			for(int m=0;m<c5;m++)
			{
				char[] a1={'+','-','*','/'};
	              int  a=(int)(Math.random()*4);
	              if(c1==1)//有乘除法
	              {
	            	  if(c3==1&&c4==1)//有负数，有余数
	            	  {
	            		  if(a1[a]=='+')
	  					{
	  						b.add(c2);
	  					}
	  					else if(a1[a]=='-')
	  					{
	  						b.jian2(c2);
	  					}
	  					else if(a1[a]=='*')
	  					{
	  						b.chen(c2);
	  					}
	  					else if(a1[a]=='/')
	  					{
	  						b.chu1(c2);
	  					}
	            	  }
	            	  else if(c3==1&&c4==2)//有负数，无余数
	            	  {
	            		  if(a1[a]=='+')
		  					{
		  						b.add(c2);
		  					}
		  					else if(a1[a]=='-')
		  					{
		  						b.jian2(c2);
		  					}
		  					else if(a1[a]=='*')
		  					{
		  						b.chen(c2);
		  					}
		  					else if(a1[a]=='/')
		  					{
		  						b.chu2(c2);
		  					}
	            	  }
	            	  else if(c3==2&&c4==2)//无负数，无余数
	            	  {
	            		  if(a1[a]=='+')
		  					{
		  						b.add(c2);
		  					}
		  					else if(a1[a]=='-')
		  					{
		  						b.jian1(c2);
		  					}
		  					else if(a1[a]=='*')
		  					{
		  						b.chen(c2);
		  					}
		  					else if(a1[a]=='/')
		  					{
		  						b.chu2(c2);
		  					}
	            	  }
	            	  else if(c3==2&&c4==1)//无负数，有余数
	            	  {
	            		  if(a1[a]=='+')
		  					{
		  						b.add(c2);
		  					}
		  					else if(a1[a]=='-')
		  					{
		  						b.jian1(c2);
		  					}
		  					else if(a1[a]=='*')
		  					{
		  						b.chen(c2);
		  					}
		  					else if(a1[a]=='/')
		  					{
		  						b.chu1(c2);
		  					}
	            	  }
	            		  
	              }
	              else if(c1==2)//无乘除法
	              {
	            	  if(c3==1)
	            	  {
	            		  b.jian2(c2);
	            	  }
	            	  else if(c3==2)
	            	  {
	            		  b.jian1(c2);
	            	  }
	              }
				
			}
		}
		else if(c==2)
		{
			System.out.println("请选择出题数量:");
			Scanner input6=new Scanner(System.in);
			int c5=input6.nextInt();
			System.out.println("请输入数值范围(最大值)");
			Scanner input3=new Scanner(System.in);
			int c2=input3.nextInt();
			System.out.println("请选择:1:有乘除法2:无乘除法");
			Scanner input2=new Scanner(System.in);
			int c1=input2.nextInt();
			for(int m=0;m<c5;m++)
			{
				if(c1==1)//有乘除法
				{
					char[] a1={'+','-','*','/'};
		              int  e1=(int)(Math.random()*4);
		              int  e2=(int)(Math.random()*4);
		              int  e3=(int)(Math.random()*4);
		              char n1=a1[e1];
		              char n2=a1[e2];
		              char n3=a1[e3];
		              int x1=b.getrandom(c2);
		              int x2=b.getrandom(c2);
		              int x3=b.getrandom(c2);
		              int x4=b.getrandom(c2);
		              System.out.print(x1);
		              System.out.print(n1);
		              System.out.print(x2);
		              System.out.print(n2);
		              System.out.print(x3);
		              System.out.print(n3);
		              System.out.print(x4);
		              System.out.print("=");
		              System.out.println();
		            	  
				}
				else if(c1==2)//无乘除法
				{
					char[] a1={'+','-'};
					 int  e1=(int)(Math.random()*4);
		              int  e2=(int)(Math.random()*4);
		              int  e3=(int)(Math.random()*4);
		              char n1=a1[e1];
		              char n2=a1[e2];
		              char n3=a1[e3];
		              int x1=b.getrandom(c2);
		              int x2=b.getrandom(c2);
		              int x3=b.getrandom(c2);
		              int x4=b.getrandom(c2);
		              System.out.print(x1);
		              System.out.print(n1);
		              System.out.print(x2);
		              System.out.print(n2);
		              System.out.print(x3);
		              System.out.print(n3);
		              System.out.print(x4);
		              System.out.print("=");
		              System.out.println();
				}
			}
		}
	}
	public  void add(int range)
    {
        int answer=0;
        int x=getrandom(range);
        int y=getrandom(range);
           System.out.print(x);
           System.out.print('+');
           System.out.print(y);
           System.out.print("=");
           System.out.println();
           System.out.println("请输入答案：");
           Scanner in2=new Scanner(System.in);
              int q=in2.nextInt();
           answer= x+ y;
           System.out.println(answer);
              if(q==answer)
              {
                  System.out.println("回答正确！");
              }
              else
                  System.out.println("回答错误！");
    }
    public void jian1(int range)//无负数
    {
        int answer=0;
        int x=getrandom(range);
        int y=getrandom(range);
      if( x> y)
      {
          System.out.print(x);
           System.out.print('-');
           System.out.print(y);
           System.out.print("=");
           System.out.println();
           System.out.println("请输入答案：");
           Scanner in2=new Scanner(System.in);
              int q=in2.nextInt();
          answer=x-y;
          if(q==answer)
          {
          System.out.println("回答正确！");
         }
         else
          System.out.println("回答错误！");
      }
    }
    public void jian2(int range)//有负数
    {
        int answer=0;
        int x=getrandom(range);
        int y=getrandom(range);
         
           System.out.print(x);
           System.out.print('-');
           System.out.print(y);
           System.out.print("=");
           System.out.println();
           System.out.println("请输入答案：");
           Scanner in2=new Scanner(System.in);
              int q=in2.nextInt();
           answer= x- y;
           System.out.println(answer);
              if(q==answer)
              {
                  System.out.println("回答正确！");
              }
              else
                  System.out.println("回答错误！");
    }
    public void chu1(int range)//有余数
    {
        int answer=0;
        int x=getrandom(range);
        int y=getrandom(range);
        if(x%y!=0)
        {
           System.out.print(x);
           System.out.print('/');
           System.out.print(y);
           System.out.print("=");
           System.out.println();
           System.out.println("请输入答案：");
           Scanner in2=new Scanner(System.in);
              int q=in2.nextInt();
              int gcd=gcd(x,y);
           answer= (x/gcd)/(y/gcd);
           System.out.println(answer);
              if(q==answer)
              {
                  System.out.println("回答正确！");
              }
              else
                  System.out.println("回答错误！");
        }
    }
     
    public void chu2(int range)//无余数
    {
        int answer=0;
        int x=getrandom(range);
        int y=getrandom(range);
        if(x%y==0)
        {
           System.out.print(x);
           System.out.print('/');
           System.out.print(y);
           System.out.print("=");
           System.out.println();
           System.out.println("请输入答案：");
           Scanner in2=new Scanner(System.in);
              int q=in2.nextInt();
              int gcd=gcd(x,y);
              answer= (x/gcd)/(y/gcd);
           System.out.println(answer);
              if(q==answer)
              {
                  System.out.println("回答正确！");
              }
              else
                  System.out.println("回答错误！");
        }
    }
    public void chen(int range)
    {
        int answer=0;
        int x=getrandom(range);
        int y=getrandom(range);
           System.out.print(x);
           System.out.print('*');
           System.out.print(y);
           System.out.print("=");
           System.out.println();
           System.out.println("请输入答案：");
           Scanner in2=new Scanner(System.in);
              int q=in2.nextInt();
           answer= x*y;
           System.out.println(answer);
              if(q==answer)
              {
                  System.out.println("回答正确！");
              }
              else
                  System.out.println("回答错误！");
    }
    public int  getrandom(int c2)
    {
        int x=(int) ( Math.random() * c2 );
        return x;
    }
    public  int gcd(int x,int y)
    {
    	int smaller=y>x?y:x;
    	int i1=1;
    	for(int i=1;i<smaller;i++)
    	{
    		if(y%i==0&&x%i==0)
    		{
    			i1=i;
    		}
    	}
    	return i1;
    
    }
}

　　

　　

设计思想：根据上周进度在进行改正，离理想目标还有很远。