import java.lang.*;

import java.util.Random;

import java.io.*;

import java.math.*;

class Cero extends Exception

{

Cero()

{

super ("\n\nERROR EN DIVICION...");

}

}

class Neg extends Exception

{

Neg()

{

super ("\n\nERROR EN RAIZ...");

}

}

class Log extends Exception

{

Log()

{

super ("\n\nERROR EN LOG...");

}

}

class R

{

double a,b;

R()

{

Random r =new Random();

a=r.nextInt(10);

b=r.nextInt(10);

// a=10;

// b=0;

System.out.print("\nA= "+a);

System.out.print("\nB= "+b);

}

public double div() throws Cero

{

if(b==0)

throw new Cero();

else

return(a/b);

}

public double raiz() throws Neg

{

if(a<0)

throw new Neg();

else

return(Math.sqrt(a));

}

public double log() throws Log

{

if(a<=0)

throw new Log();

else

return(Math.log(a));

}

}

class pro2

{

public static void main(String [] args)

{

R r;

double d,ra,l;

r = new R();

try

{

d=r.div();

System.out.print("\nDIVICION: "+r.a+"/"+r.b+" = "+d);

}

catch(Cero e)

{

System.out.println(e.getMessage());

}

try

{

ra=r.raiz();

System.out.print("\nRAIZ: "+r.a+" = "+ra);

}

catch(Neg e)

{

System.out.println(e.getMessage());

}

try

{

l=r.log();

System.out.print("\nLOGARITMO: "+r.a+" = "+l);

}

catch(Log e)

{

System.out.println(e.getMessage());

}

}

}