/**

* Exercise on encapsulation and generalization.

*/

import java.util.Scanner;

public class Exercise {

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

System.out.print("Enter a string of text, such as a simple math calculation with parentheses: ");

String s = input.nextLine();

openCloseParentheses(s);

}

public static void openCloseParentheses(String s) {

System.out.println(s);

int count = 0;

for (int i = 0; i < s.length(); i++) {

char c = s.charAt(i);

if (c == '(') {

count++;

} else if (c == ')') {

count--;

}

}

System.out.println("Number of open parentheses: " + count);

}

}