C++ sizeof Operator

#include <iostream>
using namespace std;

int main() {

    cout << sizeof(int);
  
    return 0;
}

#include <bits/stdc++.h>
using namespace std;

int main() {

    // Finding the size of different data types
    cout << "Size of char: " << sizeof(char) << endl;
    cout << "Size of int: " << sizeof(int) << endl;
    cout << "Size of float: " << sizeof(float) << endl;
    cout << "Size of double: " << sizeof(double) << endl;
    cout << "Size of long: " << sizeof(long);

    return 0;
}

#include <bits/stdc++.h>
using namespace std;

int main() {
    int a;
    float b;
    char g;

    // Printing size of all three variables
    cout << "Size of a:  " << sizeof(a) << endl;
    cout << "Size of b:  " << sizeof(b) << endl;
    cout << "Size of g:  " << sizeof(g);

    return 0;
}

#include <bits/stdc++.h>
using namespace std;

int main()  {
	int arr[] = {1, 2, 3, 5, 6};
  
  	// Finding the length of array
  	int n = sizeof(arr) / sizeof(arr[0]);
  
  	cout << n;
  	return 0;
}

#include <bits/stdc++.h>
using namespace std;

class A {
    int x;
    A(int val = 10) : x(val){}
};

int main() {
  
  	// Finding size of class A (size of the objects
  	// of class A)
    cout << "Size of Class a: " << sizeof(A);
    return 0;
}