Write a program that does the following: Get the user\'s input. if the first num

Question

Write a program that does the following:

                Get the user's input.
                if the first number is not 0:  
                Find the value of the expression
                Display the value.


The input:

  Assume that the user input is ALWAYS in the form of
      <integer><operation><integer>

  As an example   3*4
                  23-6
                  333/3
                  4+1200

The output:

  You should display the output as:
   "The result of 3*4 is 12"    (The first example above)

Explanation / Answer

import java.util.*;

import java.lang.*;

import java.io.*;

class driver

{

public static void main (String[] args)

{

int m,n;

Scanner scan = new Scanner(System.in);

while(true)

{

String s = scan.nextLine();

StringTokenizer stc = new StringTokenizer(s,"+-/*");

StringTokenizer stn = new StringTokenizer(s,"0123456789");

m = new Integer(stc.nextToken("+-/*"));

if(m==0)

return;

n = new Integer(stc.nextToken("+-/*"));

String c = stn.nextToken("0123456789");

int res=0;

if(c.equals("+"))

res = m+n;

else if(c.equals("-"))

res = m-n;

else if(c.equals("/"))

res = m/n;

else if(c.equals("*"))

res = m*n;

System.out.println("The result of "+s+" is : "+res);

}

}

}

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