#include <iostream>
#include <cstdlib>
using namespace std;

//Three of the places where we can write an expression in a C++ program.
//(This is not the complete story yet.)

int main()
{
	int i {10 + 20};         //as the initial value of a variable

	i = 30 + 40;             //as a value to be assigned to a variable

	cout << 50 + 60 << "\n"; //as an value to be output

	return EXIT_SUCCESS;
}