// This is a single-line comment
 
/* This is
a multi-line
comment */

#include <iostream> // Include the iostream header file
#define PI 3.14159   // Define a constant value for PI

int main() {
  // Code statements go here
  return 0; // Return 0 to indicate successful execution
}

int age = 25;
float price = 9.99;
char grade = 'A';
bool isReady = true;

int width; // Variable declaration
width = 10; // Variable assignment
 
// Variable declaration with initialization
int height = 5; 
 
// Variable usage in an expression
int area = width * height; 

int a = 5, b = 3, c;
c = a + b; // Addition operator
c = a * b; // Multiplication operator
c = (a == b) ? 10 : 20; // Ternary operator

if (score >= 60) {
  cout << "Passed" << endl;
} else {
  cout << "Failed" << endl;
}
 
for (int i = 0; i < 5; i++) {
  cout << i << " ";
}
 
while (count > 0) {
  cout << count << " ";
  count--;
}
 
do {
  cout << "Hello ";
} while (condition);

// Function declaration
int add(int a, int b);
 
// Function definition
int add(int a, int b) {
  return a + b;
}
 
// Function call
int result = add(3, 4);

class Rectangle {
private:
  int width;
  int height;
 
public:
  void setDimensions(int w, int h) {
    width = w;
    height = h;
  }
 
  int getArea() {
    return width * height;
  }
};
 
Rectangle rect;
rect.setDimensions(5, 3);
int area = rect.getArea();

#include <iostream>
using namespace std;
 
int main() {
  int num;
  cout << "Enter a number: ";
  cin >> num;
  cout << "The number is: " << num << endl;
  return 0;
}