源代码：
import java.util.Random;
public class szys
{
public static void main(String args[])
{
for(int i=0;i<30;i++){
int a1,a2,b1,b2,c,zf;
a1=sjs(100);
a2=sjs(100);
b1=sjs(100);
b2=sjs(100);
c=sjs(4);
zf=sjs(2);
if(zf==0){
if(c==0)
System.out.println(a1+"+"+a2+"= ");
else if(c==1)
System.out.println(a1+"-"+a2+"= ");
else if(c==2)
System.out.println(a1+"*"+a2+"= ");
else if(c==3&&a2!=0)
System.out.println(a1+"/"+a2+"= ");
}
else if(zf==1){
if(c==0)
System.out.println(a1+"/"+a2+" + "+b1+"/"+b2+"=");
else if(c==1)
System.out.println(a1+"/"+a2+" - "+b1+"/"+b2+"=");
else if(c==2)
System.out.println(a1+"/"+a2+" * "+b1+"/"+b2+"=");
else if(c==3&&a2!=0)
System.out.println(a1+"/"+a2+" / "+b1+"/"+b2+"=");
}
}
}
public static int sjs(int i){
Random a=new Random();
int a1=a.nextInt (i);
return a1;
}
}
结果截屏：
