Manuals/calci/Examples
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Examples of Java and z3 Programs
DESCRIPTION
- Synchronous Readline for interactively running to have a conversation with the user via a console.
- Original codes in java as examples.
- z3 codes with z3 notations are shown below the java code.
Examples
1. Check Odd/Even
Java Code:
https://beginnersbook.com/2014/02/java-program-to-check-even-or-odd-number
import java.util.Scanner;
class CheckEvenOdd
{
public static void main(String args[])
{
int num;
System.out.println("Enter an Integer number:");
//The input provided by user is stored in num
Scanner input = new Scanner(System.in);
num = input.nextInt();
// If number is divisible by 2 then it's an even number
// else odd number*/
if ( num % 2 == 0 )
System.out.println("Entered number is even");
else
System.out.println("Entered number is odd");
}
}
z3 code:
var readlineSync = require('readline-sync');
console.log("Starting");
var temp;
var num = readlineSync.question("Enter any number: ");
( num % 2 == 0 )::
{console.log(num + " is an even number")},
{console.log(num + " is an odd number")};
2. Sum of Array
Java Code:
https://beginnersbook.com/2014/01/java-program-to-sum-the-elements-of-an-array
import java.util.Scanner;
class SumDemo{
public static void main(String args[]){
Scanner scanner = new Scanner(System.in);
int[] array = new int[10];
int sum = 0;
System.out.println("Enter the elements:");
for (int i=0; i<10; i++)
{
array[i] = scanner.nextInt();
}
for( int num : array) {
sum = sum+num;
}
System.out.println("Sum of array elements is:"+sum);
}
}
z3 code:
var readlineSync = require('readline-sync');
console.log("Starting");
var k;
k = readlineSync.question("Number of elements: ");
var numbers = new Array(k);
//Enter numbers using comma
var num = readlineSync.question("Enter the elements: ");
var temp = num.split(",");
for (var i=0; i<k; i++)
{
numbers[i] = temp[i];
}
var sumofarray = SUM(numbers);
console.log("Sum:" +sumofarray);
3. Linear Search
Java Code:
https://beginnersbook.com/2014/04/java-program-for-linear-search-example
import java.util.Scanner;
class LinearSearchExample
{
public static void main(String args[])
{
int counter, num, item, array[];
//To capture user input
Scanner input = new Scanner(System.in);
System.out.println("Enter number of elements:");
num = input.nextInt();
//Creating array to store the all the numbers
array = new int[num];
System.out.println("Enter " + num + " integers");
//Loop to store each numbers in array
for (counter = 0; counter < num; counter++)
array[counter] = input.nextInt();
System.out.println("Enter the search value:");
item = input.nextInt();
for (counter = 0; counter < num; counter++)
{
if (array[counter] == item)
{
System.out.println(item+" is present at location "+(counter+1));
/*Item is found so to stop the search and to come out of the
* loop use break statement.*/
break;
}
}
if (counter == num)
System.out.println(item + " doesn't exist in array.");
}
}
z3 code:
var readlineSync = require('readline-sync');
console.log("Starting");
var k;
k = readlineSync.question("Number of elements: ");
var numbers = new Array(k);
//Enter numbers using comma
var num = readlineSync.question("Enter the elements: ");
var temp = num.split(",");
var item = readlineSync.question("Enter the search value: ");
for (i = 0; i < k; i++)
{
(temp[i]-item== 0)::
{
console.log(item+" is present at location "+(i+1));
break;
};
}
(i-k ==0)::
{console.log(item + " doesn't exist in array.")};
4. Floyd's Triangle
Java Code:
https://beginnersbook.com/2014/04/java-program-to-print-floyds-triangle-example
import java.util.Scanner;
class FloydTriangleExample
{
public static void main(String args[])
{
int rows, number = 1, counter, j;
//To get the user's input
Scanner input = new Scanner(System.in);
System.out.println("Enter the number of rows for floyd's triangle:");
//Copying user input into an integer variable named rows
rows = input.nextInt();
System.out.println("Floyd's triangle");
System.out.println("****************");
for ( counter = 1 ; counter <= rows ; counter++ )
{
for ( j = 1 ; j <= counter ; j++ )
{
System.out.print(number+" ");
//Incrementing the number value
number++;
}
//For new line
System.out.println();
}
}
}
z3 code:
var readlineSync = require('readline-sync');
console.log("Starting");
var rows;
var number = 1;
var counter;
var j;
//To get the user's input
rows = readlineSync.question("Enter the number of rows for floyd's triangle:");
//Copying user input into an integer variable named rows
console.log("Floyd's triangle");
console.log("****************");
for ( counter = 1 ; counter <= rows ; counter++ ){
for ( j = 1 ; j <= counter ; j++ ){
console.log(number+"");
//Incrementing the number value
number++;
}
//For new line
console.log();
};
5.Reverse Number
Java Code:
https://beginnersbook.com/2014/01/java-program-to-reverse-a-number
import java.util.Scanner;
class ReverseNumberWhile
{
public static void main(String args[])
{
int num=0;
int reversenum =0;
System.out.println("Input your number and press enter: ");
//This statement will capture the user input
Scanner in = new Scanner(System.in);
//Captured input would be stored in number num
num = in.nextInt();
//While Loop: Logic to find out the reverse number
while( num != 0 )
{
reversenum = reversenum * 10;
reversenum = reversenum + num%10;
num = num/10;
}
System.out.println("Reverse of input number is: "+reversenum);
}
}
z3 code:
var readlineSync = require('readline-sync');
console.log("Starting");
var num = 0;
var reversenum = 0;
var num = readlineSync.question("Input your number and press enter: ");
var temp = num;
while( abs(num) > 0.00001 )
{
reversenum = reversenum * 10;
reversenum = reversenum + abs(num%10);
num = FLOOR(abs(num/10));
}
console.log(SIGN(temp)*reversenum);
6.Factorial
Java Code:
https://beginnersbook.com/2014/01/java-program-to-find-factorial-of-a-given-number-using-recursion
import java.util.Scanner;
class FactorialDemo{
public static void main(String args[]){
//Scanner object for capturing the user input
Scanner scanner = new Scanner(System.in);
System.out.println("Enter the number:");
//Stored the entered value in variable
int num = scanner.nextInt();
//Called the user defined function fact
int factorial = fact(num);
System.out.println("Factorial of entered number is: "+factorial);
}
static int fact(int n)
{
int output;
if(n==1){
return 1;
}
//Recursion: Function calling itself!!
output = fact(n-1)* n;
return output;
}
}
z3 code:
var readlineSync = require('readline-sync');
console.log("Starting");
var num;
var fact;
num = readlineSync.question("Enter the number: ");
console.log(typeof num)
fact = FACTORIAL(num*1);
console.log(num,fact);
7.Area of Rectangle
Java Code:
https://beginnersbook.com/2014/01/java-program-to-calculate-area-of-rectangle
import java.util.Scanner;
class AreaOfRectangle {
public static void main (String[] args)
{
Scanner scanner = new Scanner(System.in);
System.out.println("Enter the length of Rectangle:");
double length = scanner.nextDouble();
System.out.println("Enter the width of Rectangle:");
double width = scanner.nextDouble();
//Area = length*width;
double area = length*width;
System.out.println("Area of Rectangle is:"+area);
}
}
z3 code:
var readlineSync = require('readline-sync');
console.log("Starting");
var length;
var width;
var area;
length = readlineSync.question("Enter the length of Rectangle:");
width = readlineSync.question("Enter the width of Rectangle:");
//Area = length*width;
area = length*width;
console.log("Area of Rectangle is:"+area);