import java.util.Random;
import java.util.Scanner;
class Suan1
{
public int x,y,c;
public Random random=new Random();
String m;
public String shengcheng()
{
c=random.nextInt(4);
String fuhao;
x=random.nextInt(100);
y=random.nextInt(100);
if(c==0)
{
fuhao="+";
}
else if(c==1)
{
fuhao="-";
}
else if(c==2)
{
fuhao="*";
}
else
{
fuhao="/";
}
m=String.valueOf(x)+fuhao+String.valueOf(y);
return m;
}
public void shuchu()
{
if(c==0)
{
System.out.println(x+"+"+y+"=");
}
else if(c==1)
{
if(x>=y)
System.out.println(x+"-"+y+"=");
else
System.out.println(y+"-"+x+"=");
}
else if(c==2)
{
if(x*y<100)
{
System.out.println(x+"*"+y+"=");
}
else
{
for(int i=0;;i++)
{
if(x*y<=100)
{
System.out.println(x+"*"+y+"=");
break;
}
else
{
y=random.nextInt(100);
}
}
}
}
else if(c==3)
{
for(int i=0;;i++)
{
if(y==0)
{
y=random.nextInt();
}
else
{
break;
}
}
System.out.println(x*y+"/"+y+"=");
}
}
public int jianyan(String a[],int s)
{
int flag=1;
for(int i=0;i<s;i++)
{
if(m.equals(a[i]))
{
System.out.println(m);
flag=0;
break;
}
}
return flag;
}
}
class Suan2
{
public int m,n,x,y,c;
public Random random=new Random();
String s;
public String shengcheng()
{
c=random.nextInt(4);
x=random.nextInt(50);
y=random.nextInt(50);
m=random.nextInt(50);
n=random.nextInt(50);
String fuhao;
if(c==0)
{
fuhao="+";
}
else if(c==1)
{
fuhao="-";
}
else if(c==2)
{
fuhao="*";
}
else
{
fuhao="/";
}
s=String.valueOf(x)+fuhao+String.valueOf(y);
return s;
}
public void shuchu()
{
for(int i=0;;i++)
{
if(x==0)
{
x=random.nextInt(50);
}
else
{
break;
}
}
for(int i=0;;i++)
{
if(y==0)
{
y=random.nextInt(50);
}
else
{
break;
}
}
for(int i=0;;i++)
{
if(m==0)
{
m=random.nextInt(50);
}
else
{
break;
}
}
for(int i=0;;i++)
{
if(n==0)
{
n=random.nextInt(50);
}
else
{
break;
}
}
if(c==0)
{
if(x>y&&m>n)
{
System.out.println(y+"/"+x+" + "+n+"/"+m+"=");
}
else if(x>y&&m<n)
{
System.out.println(y+"/"+x+" + "+m+"/"+n+"=");
}
else if(x<y&&m>n)
{
System.out.println(x+"/"+y+" + "+n+"/"+m+"=");
}
else
{
System.out.println(x+"/"+y+" + "+m+"/"+n+"=");
}
}
else if(c==1)
{
if(x>y&&m>n)
{
System.out.println(y+"/"+x+" - "+n+"/"+m+"=");
}
else if(x>y&&m<n)
{
System.out.println(y+"/"+x+" - "+m+"/"+n+"=");
}
else if(x<y&&m>n)
{
System.out.println(x+"/"+y+" - "+n+"/"+m+"=");
}
else
{
System.out.println(x+"/"+y+" - "+m+"/"+n+"=");
}
}
else if(c==2)
{
if(x>y&&m>n)
{
System.out.println(y+"/"+x+" * "+n+"/"+m+"=");
}
else if(x>y&&m<n)
{
System.out.println(y+"/"+x+" * "+m+"/"+n+"=");
}
else if(x<y&&m>n)
{
System.out.println(x+"/"+y+" * "+n+"/"+m+"=");
}
else
{
System.out.println(x+"/"+y+" * "+m+"/"+n+"=");
}
}
else
{
if(x>y&&m>n)
{
System.out.println(y+"/"+x+" / "+n+"/"+m+"=");
}
else if(x>y&&m<n)
{
System.out.println(y+"/"+x+" / "+m+"/"+n+"=");
}
else if(x<y&&m>n)
{
System.out.println(x+"/"+y+" / "+n+"/"+m+"=");
}
else
{
System.out.println(x+"/"+y+" / "+m+"/"+n+"=");
}
}
}
public int jianyan(String a[],int l)
{
int flag=1;
for(int i=0;i<l;i++)
{
if(s.equals(a[i]))
{
System.out.println(m);
flag=0;
break;
}
}
return flag;
}
}
public class Jisuan {
public static void main(String[] args) {
// TODO 自动生成的方法存根
Random random=new Random();
Suan1 a=new Suan1();
Suan2 b=new Suan2();
Scanner in=new Scanner(System.in);
String shuju[]=new String[30];
int flag=0;
int m=0;
for(int i=0;i<30;i++)
{
shuju[i]=new String();
}
for(int i=0;;i++)
{
System.out.println("1 整数的四则计算");
System.out.println("2 真分数的四则计算");
System.out.println("3 整数与真分数的混合四则运算");
System.out.println("4 退出");
System.out.println("请选择：");
int t=in.nextInt();
if(t==1)
{
while(m<30)
{
shuju[m]=a.shengcheng();
flag=a.jianyan(shuju, m);
if(flag==1)
{
a.shuchu();
m++;
flag=0;
}
}
m=0;
}
else if(t==2)
{
while(m<30)
{
shuju[m]=b.shengcheng();
flag=b.jianyan(shuju, m);
if(flag==1)
{
b.shuchu();
m++;
flag=0;
}
}
m=0;
}
else if(t==3)
{
while(m<30)
{
int suiji=random.nextInt(2);
if(suiji==0)
{
shuju[m]=b.shengcheng();
flag=b.jianyan(shuju, m);
if(flag==1)
{
b.shuchu();
m++;
flag=0;
}
}
else
{
shuju[m]=a.shengcheng();
flag=a.jianyan(shuju, m);
if(flag==1)
{
a.shuchu();
m++;
flag=0;
}
}
}
m=0;
}
else
{
break;
}
}
}
}
