四则运算二

三个随机数   

其中一个用来判断运算符

public class yunsuan {
static int i;
static double k;
static double a;
static double b;
static double c;
public static void main(String[] args) {
// TODO Auto-generated method stub

for(i=0;i<60;i++)
{
double x=1+(int)(Math.random()*100);
double n=1+(int)(Math.random()*4);
double m=1+(int)(Math.random()*x);
a=x;
b=n;
c=m;
if(n==1)
{
System.out.println(x+" + "+m+"=");
k=x+m;
System.out.println(k);
}
else if (n==2)
{
System.out.println(x+" - "+m+"=");
k=x-m;
System.out.println(k);
}
else if (n==3)
{
System.out.println(x+" x "+m+"=");
k=x*m;
System.out.println(k);

}
else
{
System.out.println(x+" / "+m+"=");
k=x/m;
System.out.println(k);
}
}
}

}