四则运算

package sizeyunsuan;

import java.util.*;
public class Test {
public static String yuefen(int a,int b){
int y = 1;
for(int i=a;i>=1;i--){
if(a%i==0&&b%i==0){
y = i;
break;
}
}
int z = a/y;
int m = b/y;
if(z==0) {
return "0";
}
return ""+z+"/"+m;
}
public static void main(String[] args) {
// TODO Auto-generated method stub
int x,y,i,a1;
int d1=0;
String d = null;
System.out.println("四则运算");
x=300;
int daan[]=new int [x];
y=100;
for(i=0;i<x;i++){
int a=(int)(Math.random()*y);
int b=(int)(Math.random()*y);
int c=(int)(Math.random()*3);
if(c==0)
{
d1=a+b;
System.out.print(a+"+"+b+"=");
}
if(c==1)
{
d1=a-b;
System.out.print(a+"-"+b+"=");
}
if(c==2)
{
d1=a*b;
System.out.print(a+"*"+b+"=");
}
if(c==3)
{
d1=a/b;
System.out.print(a+"/"+b+"=");
}

}
}
}